{
  "report_id": "104-activity-exploration",
  "status": "validated",
  "version": "1.0",
  "publication": {
    "headline": "Mezclar actividades parece sumar 12 puntos de continuidad, pero la ventaja desaparece al igualar la frecuencia",
    "canonical_url": "https://wodbuster.com/observatorio/variedad-actividades-continuidad/",
    "date_modified": "2026-07-18"
  },
  "period": {
    "activity_start": "2025-01-01",
    "activity_end": "2025-12-31",
    "outcome_months": "2025-01-01/2025-11-30"
  },
  "definition": {
    "participant_month": "Mes en el que una persona registra al menos una asistencia.",
    "multi_activity": "Mes con asistencias en dos o más tipos de actividad.",
    "next_month_return": "Actividad registrada en el mes natural inmediatamente posterior.",
    "adjustment": "Comparación dentro del mismo centro, mes y frecuencia exacta; después cada centro pesa una vez."
  },
  "rules": {
    "minimum_participant_months_per_center": 100,
    "minimum_valid_cells_per_center": 3,
    "maximum_exact_frequency": 12,
    "frequency_13_or_more_excluded_from_adjustment": true
  },
  "sample": {
    "tenants_attempted": 2174,
    "tenants_succeeded": 2174,
    "tenants_failed": 0,
    "centers_with_activity": 2159,
    "participant_months": 3519632,
    "returned_participant_months": 2953730,
    "eligible_centers": 2128,
    "eligible_participant_months": 3517927
  },
  "diversity": {
    "multi_activity_share_pct": {
      "p25": 13.96,
      "median": 43.49,
      "p75": 64.68
    },
    "by_activity_count": [
      {
        "activity_count": "1",
        "median_center_share_pct": 56.51
      },
      {
        "activity_count": "2",
        "median_center_share_pct": 24.7
      },
      {
        "activity_count": "3",
        "median_center_share_pct": 8.71
      },
      {
        "activity_count": "4+",
        "median_center_share_pct": 1.83
      }
    ]
  },
  "unadjusted_return": {
    "minimum_participant_months_per_group": 50,
    "centers": 1721,
    "one_activity_median_return_pct": 77.06,
    "multiple_activity_median_return_pct": 89.92,
    "median_paired_difference_pp": 12.06,
    "bootstrap_95_ci": [
      11.69,
      12.5
    ]
  },
  "adjusted_return": {
    "minimum_per_month_frequency_cell": 5,
    "minimum_valid_cells_per_center": 3,
    "centers": 1217,
    "median_adjusted_difference_pp": -0.86,
    "bootstrap_95_ci": [
      -1.09,
      -0.59
    ],
    "center_effect_distribution": {
      "p25": -3.61,
      "median": -0.86,
      "p75": 1.51
    },
    "centers_multi_higher_pct": 39.93,
    "median_valid_cells": 22
  },
  "adjustment_sensitivities": [
    {
      "minimum_per_month_frequency_cell": 3,
      "minimum_valid_cells_per_center": 3,
      "centers": 1630,
      "median_adjusted_difference_pp": -0.68,
      "bootstrap_95_ci": [
        -0.87,
        -0.49
      ],
      "center_effect_distribution": {
        "p25": -3.36,
        "median": -0.68,
        "p75": 1.67
      },
      "centers_multi_higher_pct": 40.67,
      "median_valid_cells": 38.0
    },
    {
      "minimum_per_month_frequency_cell": 5,
      "minimum_valid_cells_per_center": 3,
      "centers": 1217,
      "median_adjusted_difference_pp": -0.86,
      "bootstrap_95_ci": [
        -1.09,
        -0.59
      ],
      "center_effect_distribution": {
        "p25": -3.61,
        "median": -0.86,
        "p75": 1.51
      },
      "centers_multi_higher_pct": 39.93,
      "median_valid_cells": 22
    },
    {
      "minimum_per_month_frequency_cell": 10,
      "minimum_valid_cells_per_center": 3,
      "centers": 471,
      "median_adjusted_difference_pp": -0.7,
      "bootstrap_95_ci": [
        -1.09,
        -0.4
      ],
      "center_effect_distribution": {
        "p25": -3.18,
        "median": -0.7,
        "p75": 1.5
      },
      "centers_multi_higher_pct": 39.92,
      "median_valid_cells": 10
    }
  ],
  "by_exact_frequency": [
    {
      "monthly_attendances": 2,
      "centers": 332,
      "median_adjusted_difference_pp": -1.42,
      "bootstrap_95_ci": [
        -2.53,
        -0.13
      ]
    },
    {
      "monthly_attendances": 3,
      "centers": 421,
      "median_adjusted_difference_pp": -0.81,
      "bootstrap_95_ci": [
        -1.9,
        0.74
      ]
    },
    {
      "monthly_attendances": 4,
      "centers": 517,
      "median_adjusted_difference_pp": -1.57,
      "bootstrap_95_ci": [
        -2.47,
        -0.75
      ]
    },
    {
      "monthly_attendances": 5,
      "centers": 494,
      "median_adjusted_difference_pp": -0.39,
      "bootstrap_95_ci": [
        -1.09,
        0.41
      ]
    },
    {
      "monthly_attendances": 6,
      "centers": 529,
      "median_adjusted_difference_pp": -0.75,
      "bootstrap_95_ci": [
        -1.67,
        -0.04
      ]
    },
    {
      "monthly_attendances": 7,
      "centers": 645,
      "median_adjusted_difference_pp": -1.22,
      "bootstrap_95_ci": [
        -1.8,
        -0.84
      ]
    },
    {
      "monthly_attendances": 8,
      "centers": 755,
      "median_adjusted_difference_pp": -1.12,
      "bootstrap_95_ci": [
        -1.51,
        -0.76
      ]
    },
    {
      "monthly_attendances": 9,
      "centers": 556,
      "median_adjusted_difference_pp": -0.44,
      "bootstrap_95_ci": [
        -0.87,
        0.0
      ]
    },
    {
      "monthly_attendances": 10,
      "centers": 358,
      "median_adjusted_difference_pp": 0.0,
      "bootstrap_95_ci": [
        -0.89,
        0.5
      ]
    },
    {
      "monthly_attendances": 11,
      "centers": 286,
      "median_adjusted_difference_pp": 0.0,
      "bootstrap_95_ci": [
        -0.59,
        0.13
      ]
    },
    {
      "monthly_attendances": 12,
      "centers": 335,
      "median_adjusted_difference_pp": -0.33,
      "bootstrap_95_ci": [
        -0.85,
        0.0
      ]
    }
  ],
  "quality": {
    "largest_center_share_pct": 0.55,
    "all_tenants_succeeded": true,
    "personal_identifiers_extracted": false,
    "class_identifiers_extracted": false,
    "activity_names_extracted": false
  },
  "limitations": [
    "La comparación iguala centro, mes y número de asistencias, pero no edad, antigüedad, tarifa, objetivos o actividad concreta.",
    "Explorar actividades puede ser consecuencia de una motivación previa y no una causa de continuidad.",
    "Volver al mes siguiente no equivale a mantener una cuota ni a permanecer a largo plazo.",
    "Los tipos de actividad son categorías internas de cada centro y no se homologan por nombre entre negocios."
  ]
}