{
  "report_id": "172-second-visit-consolidation",
  "status": "validated",
  "version": "1.0",
  "publication": {
    "date_published": "2026-07-19",
    "date_modified": "2026-07-19",
    "canonical_url": "https://wodbuster.com/observatorio/segunda-visita-temprana-cuarta-asistencia/"
  },
  "period": {
    "profile_creation_and_first_visit": "2022-01-01/2025-12-31",
    "observation_cutoff_exclusive": "2026-05-02"
  },
  "definitions": {
    "early_second_visit": "Segunda asistencia durante los días 0–7 posteriores a la primera.",
    "late_second_visit": "Segunda asistencia durante los días 8–30 posteriores a la primera.",
    "equal_followup": "Tercera y cuarta asistencia observadas durante los 30 días posteriores a la segunda."
  },
  "sample": {
    "source_centers": 2153,
    "returning_participants": 305410,
    "primary_comparable_centers": 391,
    "primary_early_group": 97706,
    "primary_late_group": 13695
  },
  "comparisons": {
    "open_access": {
      "pooled_centers_2022_2025": {
        "minimum_returning_participants_each_group": 20,
        "centers": 391,
        "early_returning_participants": 97706,
        "late_returning_participants": 13695,
        "third_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 94.13,
            "median": 96.71,
            "p75": 98.06
          },
          "late_second_visit": {
            "p25": 82.1,
            "median": 89.29,
            "p75": 95.24
          },
          "early_minus_late_pp": {
            "p25": 1.86,
            "median": 6.89,
            "p75": 12.78
          },
          "bootstrap_95_ci_median_difference_pp": [
            6.11,
            7.87
          ],
          "early_higher_pct_of_centers": 82.1
        },
        "fourth_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 88.4,
            "median": 92.77,
            "p75": 95.69
          },
          "late_second_visit": {
            "p25": 67.87,
            "median": 78.05,
            "p75": 88.52
          },
          "early_minus_late_pp": {
            "p25": 5.41,
            "median": 12.94,
            "p75": 21.43
          },
          "bootstrap_95_ci_median_difference_pp": [
            11.58,
            14.61
          ],
          "early_higher_pct_of_centers": 91.3
        },
        "largest_center_early_share_pct": 1.7,
        "largest_center_late_share_pct": 3.47
      },
      "yearly_minimum_5_each_group": {
        "2022": {
          "minimum_returning_participants_each_group": 5,
          "centers": 166,
          "early_returning_participants": 10016,
          "late_returning_participants": 1476,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 93.37,
              "median": 96.89,
              "p75": 99.81
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 90.45,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.71,
              "median": 3.64,
              "p75": 15.51
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              7.98
            ],
            "early_higher_pct_of_centers": 52.41
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 86.47,
              "median": 93.09,
              "p75": 96.81
            },
            "late_second_visit": {
              "p25": 60.38,
              "median": 80.0,
              "p75": 91.48
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 12.61,
              "p75": 25.18
            },
            "bootstrap_95_ci_median_difference_pp": [
              8.45,
              16.67
            ],
            "early_higher_pct_of_centers": 72.89
          },
          "largest_center_early_share_pct": 4.92,
          "largest_center_late_share_pct": 3.79
        },
        "2023": {
          "minimum_returning_participants_each_group": 5,
          "centers": 286,
          "early_returning_participants": 19184,
          "late_returning_participants": 2756,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 94.01,
              "median": 96.9,
              "p75": 98.69
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 90.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.84,
              "median": 4.16,
              "p75": 14.2
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              7.43
            ],
            "early_higher_pct_of_centers": 54.2
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 87.05,
              "median": 93.63,
              "p75": 96.88
            },
            "late_second_visit": {
              "p25": 62.5,
              "median": 80.0,
              "p75": 94.17
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 11.47,
              "p75": 23.33
            },
            "bootstrap_95_ci_median_difference_pp": [
              9.13,
              14.53
            ],
            "early_higher_pct_of_centers": 71.68
          },
          "largest_center_early_share_pct": 3.13,
          "largest_center_late_share_pct": 4.03
        },
        "2024": {
          "minimum_returning_participants_each_group": 5,
          "centers": 539,
          "early_returning_participants": 37538,
          "late_returning_participants": 5159,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 94.87,
              "median": 97.44,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 81.25,
              "median": 91.89,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.59,
              "median": 1.71,
              "p75": 14.94
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              5.23
            ],
            "early_higher_pct_of_centers": 51.02
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 89.68,
              "median": 94.12,
              "p75": 97.22
            },
            "late_second_visit": {
              "p25": 66.67,
              "median": 81.82,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 10.78,
              "p75": 24.39
            },
            "bootstrap_95_ci_median_difference_pp": [
              9.02,
              13.04
            ],
            "early_higher_pct_of_centers": 68.46
          },
          "largest_center_early_share_pct": 0.95,
          "largest_center_late_share_pct": 2.15
        },
        "2025": {
          "minimum_returning_participants_each_group": 5,
          "centers": 915,
          "early_returning_participants": 78315,
          "late_returning_participants": 10088,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 95.24,
              "median": 97.67,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 90.91,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -0.56,
              "median": 5.36,
              "p75": 14.83
            },
            "bootstrap_95_ci_median_difference_pp": [
              3.08,
              6.7
            ],
            "early_higher_pct_of_centers": 57.27
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 90.0,
              "median": 94.79,
              "p75": 97.52
            },
            "late_second_visit": {
              "p25": 66.67,
              "median": 80.0,
              "p75": 92.31
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 12.18,
              "p75": 24.34
            },
            "bootstrap_95_ci_median_difference_pp": [
              10.48,
              13.55
            ],
            "early_higher_pct_of_centers": 73.33
          },
          "largest_center_early_share_pct": 0.55,
          "largest_center_late_share_pct": 1.99
        }
      }
    },
    "bonus": {
      "pooled_centers_2022_2025": {
        "minimum_returning_participants_each_group": 20,
        "centers": 203,
        "early_returning_participants": 27557,
        "late_returning_participants": 6744,
        "third_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 87.09,
            "median": 92.96,
            "p75": 95.8
          },
          "late_second_visit": {
            "p25": 78.42,
            "median": 85.19,
            "p75": 92.94
          },
          "early_minus_late_pp": {
            "p25": 0.48,
            "median": 6.05,
            "p75": 11.54
          },
          "bootstrap_95_ci_median_difference_pp": [
            4.86,
            7.3
          ],
          "early_higher_pct_of_centers": 77.83
        },
        "fourth_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 74.61,
            "median": 85.16,
            "p75": 92.06
          },
          "late_second_visit": {
            "p25": 60.59,
            "median": 72.55,
            "p75": 86.04
          },
          "early_minus_late_pp": {
            "p25": 2.89,
            "median": 10.23,
            "p75": 18.79
          },
          "bootstrap_95_ci_median_difference_pp": [
            7.23,
            12.67
          ],
          "early_higher_pct_of_centers": 86.7
        },
        "largest_center_early_share_pct": 4.43,
        "largest_center_late_share_pct": 2.43
      },
      "yearly_minimum_5_each_group": {
        "2022": {
          "minimum_returning_participants_each_group": 5,
          "centers": 68,
          "early_returning_participants": 2338,
          "late_returning_participants": 614,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 81.05,
              "median": 89.93,
              "p75": 97.03
            },
            "late_second_visit": {
              "p25": 79.64,
              "median": 86.61,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -6.79,
              "median": 1.09,
              "p75": 14.36
            },
            "bootstrap_95_ci_median_difference_pp": [
              -0.24,
              7.5
            ],
            "early_higher_pct_of_centers": 51.47
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 63.99,
              "median": 79.58,
              "p75": 91.07
            },
            "late_second_visit": {
              "p25": 60.0,
              "median": 69.05,
              "p75": 83.33
            },
            "early_minus_late_pp": {
              "p25": -5.81,
              "median": 7.7,
              "p75": 23.04
            },
            "bootstrap_95_ci_median_difference_pp": [
              2.56,
              13.36
            ],
            "early_higher_pct_of_centers": 64.71
          },
          "largest_center_early_share_pct": 16.25,
          "largest_center_late_share_pct": 8.31
        },
        "2023": {
          "minimum_returning_participants_each_group": 5,
          "centers": 138,
          "early_returning_participants": 4862,
          "late_returning_participants": 1228,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 86.14,
              "median": 92.19,
              "p75": 96.4
            },
            "late_second_visit": {
              "p25": 75.37,
              "median": 87.5,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -5.35,
              "median": 2.48,
              "p75": 13.33
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              6.52
            ],
            "early_higher_pct_of_centers": 52.17
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 73.33,
              "median": 84.11,
              "p75": 91.92
            },
            "late_second_visit": {
              "p25": 56.47,
              "median": 71.83,
              "p75": 85.71
            },
            "early_minus_late_pp": {
              "p25": -0.43,
              "median": 8.7,
              "p75": 20.62
            },
            "bootstrap_95_ci_median_difference_pp": [
              6.25,
              11.52
            ],
            "early_higher_pct_of_centers": 68.12
          },
          "largest_center_early_share_pct": 9.71,
          "largest_center_late_share_pct": 5.21
        },
        "2024": {
          "minimum_returning_participants_each_group": 5,
          "centers": 261,
          "early_returning_participants": 9534,
          "late_returning_participants": 2477,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 87.8,
              "median": 93.75,
              "p75": 98.02
            },
            "late_second_visit": {
              "p25": 77.78,
              "median": 87.5,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -3.75,
              "median": 1.79,
              "p75": 14.03
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              6.03
            ],
            "early_higher_pct_of_centers": 52.87
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 76.09,
              "median": 87.5,
              "p75": 93.94
            },
            "late_second_visit": {
              "p25": 58.82,
              "median": 75.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -2.99,
              "median": 8.57,
              "p75": 21.9
            },
            "bootstrap_95_ci_median_difference_pp": [
              6.47,
              11.11
            ],
            "early_higher_pct_of_centers": 64.75
          },
          "largest_center_early_share_pct": 1.78,
          "largest_center_late_share_pct": 2.02
        },
        "2025": {
          "minimum_returning_participants_each_group": 5,
          "centers": 441,
          "early_returning_participants": 19950,
          "late_returning_participants": 5008,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 87.72,
              "median": 94.29,
              "p75": 98.44
            },
            "late_second_visit": {
              "p25": 76.92,
              "median": 87.5,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.64,
              "median": 4.74,
              "p75": 14.96
            },
            "bootstrap_95_ci_median_difference_pp": [
              3.22,
              6.67
            ],
            "early_higher_pct_of_centers": 58.05
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 76.92,
              "median": 87.18,
              "p75": 93.85
            },
            "late_second_visit": {
              "p25": 57.14,
              "median": 75.0,
              "p75": 88.89
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 9.31,
              "p75": 22.22
            },
            "bootstrap_95_ci_median_difference_pp": [
              7.14,
              11.22
            ],
            "early_higher_pct_of_centers": 70.29
          },
          "largest_center_early_share_pct": 1.75,
          "largest_center_late_share_pct": 1.6
        }
      }
    },
    "free_booking_tariff": {
      "pooled_centers_2022_2025": {
        "minimum_returning_participants_each_group": 20,
        "centers": 87,
        "early_returning_participants": 25464,
        "late_returning_participants": 2992,
        "third_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 96.97,
            "median": 98.25,
            "p75": 99.29
          },
          "late_second_visit": {
            "p25": 85.71,
            "median": 95.0,
            "p75": 97.81
          },
          "early_minus_late_pp": {
            "p25": 0.04,
            "median": 3.66,
            "p75": 11.16
          },
          "bootstrap_95_ci_median_difference_pp": [
            2.51,
            5.24
          ],
          "early_higher_pct_of_centers": 74.71
        },
        "fourth_visit_within_30d_after_second_pct": {
          "early_second_visit": {
            "p25": 92.92,
            "median": 95.94,
            "p75": 97.83
          },
          "late_second_visit": {
            "p25": 79.13,
            "median": 86.59,
            "p75": 91.55
          },
          "early_minus_late_pp": {
            "p25": 4.53,
            "median": 8.07,
            "p75": 14.13
          },
          "bootstrap_95_ci_median_difference_pp": [
            6.98,
            11.36
          ],
          "early_higher_pct_of_centers": 93.1
        },
        "largest_center_early_share_pct": 2.44,
        "largest_center_late_share_pct": 15.88
      },
      "yearly_minimum_5_each_group": {
        "2022": {
          "minimum_returning_participants_each_group": 5,
          "centers": 60,
          "early_returning_participants": 3517,
          "late_returning_participants": 521,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 96.33,
              "median": 98.58,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 82.5,
              "median": 100.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.4,
              "median": 0.0,
              "p75": 13.39
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              6.88
            ],
            "early_higher_pct_of_centers": 40.0
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 92.66,
              "median": 95.92,
              "p75": 99.4
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 88.19,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": 0.0,
              "median": 6.62,
              "p75": 18.36
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              13.82
            ],
            "early_higher_pct_of_centers": 61.67
          },
          "largest_center_early_share_pct": 5.23,
          "largest_center_late_share_pct": 9.98
        },
        "2023": {
          "minimum_returning_participants_each_group": 5,
          "centers": 112,
          "early_returning_participants": 8461,
          "late_returning_participants": 1039,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 96.95,
              "median": 98.87,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 83.33,
              "median": 100.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.61,
              "median": 0.0,
              "p75": 13.41
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              0.0
            ],
            "early_higher_pct_of_centers": 35.71
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 94.24,
              "median": 96.4,
              "p75": 98.45
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 87.5,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -2.11,
              "median": 6.28,
              "p75": 17.58
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              11.11
            ],
            "early_higher_pct_of_centers": 58.04
          },
          "largest_center_early_share_pct": 4.46,
          "largest_center_late_share_pct": 10.68
        },
        "2024": {
          "minimum_returning_participants_each_group": 5,
          "centers": 201,
          "early_returning_participants": 14937,
          "late_returning_participants": 1674,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 97.42,
              "median": 99.22,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 83.33,
              "median": 100.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -0.91,
              "median": 0.0,
              "p75": 12.14
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              0.0
            ],
            "early_higher_pct_of_centers": 38.81
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 93.55,
              "median": 97.22,
              "p75": 98.96
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 88.37,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.39,
              "median": 5.7,
              "p75": 16.1
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              9.47
            ],
            "early_higher_pct_of_centers": 55.22
          },
          "largest_center_early_share_pct": 2.04,
          "largest_center_late_share_pct": 6.63
        },
        "2025": {
          "minimum_returning_participants_each_group": 5,
          "centers": 381,
          "early_returning_participants": 32701,
          "late_returning_participants": 3294,
          "third_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 97.87,
              "median": 99.32,
              "p75": 100.0
            },
            "late_second_visit": {
              "p25": 85.71,
              "median": 100.0,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -0.71,
              "median": 0.0,
              "p75": 12.5
            },
            "bootstrap_95_ci_median_difference_pp": [
              0.0,
              0.0
            ],
            "early_higher_pct_of_centers": 40.16
          },
          "fourth_visit_within_30d_after_second_pct": {
            "early_second_visit": {
              "p25": 95.24,
              "median": 97.56,
              "p75": 99.1
            },
            "late_second_visit": {
              "p25": 80.0,
              "median": 88.89,
              "p75": 100.0
            },
            "early_minus_late_pp": {
              "p25": -1.3,
              "median": 7.88,
              "p75": 17.71
            },
            "bootstrap_95_ci_median_difference_pp": [
              3.26,
              9.74
            ],
            "early_higher_pct_of_centers": 56.43
          },
          "largest_center_early_share_pct": 1.02,
          "largest_center_late_share_pct": 6.1
        }
      }
    }
  },
  "open_access_sensitivity": {
    "10": {
      "minimum_returning_participants_each_group": 10,
      "centers": 959,
      "early_returning_participants": 182443,
      "late_returning_participants": 21391,
      "third_visit_within_30d_after_second_pct": {
        "early_second_visit": {
          "p25": 95.4,
          "median": 97.41,
          "p75": 98.76
        },
        "late_second_visit": {
          "p25": 82.61,
          "median": 90.62,
          "p75": 96.61
        },
        "early_minus_late_pp": {
          "p25": 0.0,
          "median": 6.47,
          "p75": 13.26
        },
        "bootstrap_95_ci_median_difference_pp": [
          5.81,
          7.24
        ],
        "early_higher_pct_of_centers": 72.68
      },
      "fourth_visit_within_30d_after_second_pct": {
        "early_second_visit": {
          "p25": 90.73,
          "median": 94.37,
          "p75": 96.9
        },
        "late_second_visit": {
          "p25": 69.23,
          "median": 80.0,
          "p75": 90.0
        },
        "early_minus_late_pp": {
          "p25": 5.01,
          "median": 13.12,
          "p75": 21.63
        },
        "bootstrap_95_ci_median_difference_pp": [
          12.12,
          14.14
        ],
        "early_higher_pct_of_centers": 86.86
      },
      "largest_center_early_share_pct": 0.91,
      "largest_center_late_share_pct": 2.22
    },
    "40": {
      "minimum_returning_participants_each_group": 40,
      "centers": 87,
      "early_returning_participants": 31012,
      "late_returning_participants": 5429,
      "third_visit_within_30d_after_second_pct": {
        "early_second_visit": {
          "p25": 92.79,
          "median": 96.03,
          "p75": 97.65
        },
        "late_second_visit": {
          "p25": 79.61,
          "median": 87.5,
          "p75": 92.59
        },
        "early_minus_late_pp": {
          "p25": 4.02,
          "median": 7.51,
          "p75": 12.87
        },
        "bootstrap_95_ci_median_difference_pp": [
          6.49,
          10.16
        ],
        "early_higher_pct_of_centers": 89.66
      },
      "fourth_visit_within_30d_after_second_pct": {
        "early_second_visit": {
          "p25": 86.28,
          "median": 91.23,
          "p75": 94.39
        },
        "late_second_visit": {
          "p25": 63.33,
          "median": 76.19,
          "p75": 84.95
        },
        "early_minus_late_pp": {
          "p25": 8.12,
          "median": 13.27,
          "p75": 21.27
        },
        "bootstrap_95_ci_median_difference_pp": [
          11.23,
          16.37
        ],
        "early_higher_pct_of_centers": 94.25
      },
      "largest_center_early_share_pct": 5.35,
      "largest_center_late_share_pct": 8.75
    }
  },
  "quality": {
    "equal_followup_after_second_visit": true,
    "pooled_comparison_weights_each_center_once": true,
    "access_separated_before_comparison": true,
    "personal_or_center_identifiers_exported": false,
    "tenants_attempted": 2174,
    "tenants_succeeded": 2174,
    "tenants_failed": 0
  },
  "limitations": [
    "El momento de la segunda visita es una asociación y no demuestra que acelerarla cause más consolidación.",
    "Motivación, producto, actividad, agenda y disponibilidad pueden explicar parte de la diferencia.",
    "Solo se incluyen personas que realizan una segunda visita en 30 días; no mide conversión desde registro ni a quienes no regresan."
  ]
}