{
  "report_id": "009-lost-credit",
  "status": "validated",
  "version": "1.1",
  "publication": {
    "headline": "Las clases de las 7:00 registran un 84 % más de ausencias sin devolución que las de las 12:00",
    "canonical_url": "https://wodbuster.com/observatorio/ausencias-sin-devolucion/",
    "date_modified": "2026-07-19"
  },
  "period": {
    "benchmark": "2025-01-01/2025-12-31",
    "trend": "2019-01-01/2025-12-31"
  },
  "sample": {
    "centers_2025": 2136,
    "reservations_2025": 47895987,
    "lost_credit_records_2025": 1387035,
    "centers_paired_7_vs_12": 521,
    "centers_paired_monday_vs_friday": 2009,
    "centers_stable_2019_2025": 310
  },
  "definition": {
    "lost_credit_absence": "La reserva termina sin asistencia y sin devolución del crédito. Puede ser una cancelación tardía o una ausencia sin aviso.",
    "center_benchmark": "Se calcula la proporción dentro de cada centro elegible y después se toma la mediana de centros."
  },
  "findings": {
    "typical_center_pct": 2.42,
    "center_p25_pct": 1.14,
    "center_p75_pct": 3.91,
    "share_of_nonattendance_typical_center_pct": 8.82,
    "paired_7am_pct": 2.9,
    "paired_12pm_pct": 1.57,
    "paired_7am_minus_12pm_pp": 0.75,
    "paired_7am_relative_difference_pct": 84.06,
    "centers_where_7am_is_higher_pct": 69.67,
    "paired_monday_pct": 2.28,
    "paired_friday_pct": 2.74,
    "paired_friday_minus_monday_pp": 0.34,
    "centers_where_friday_is_higher_pct": 69.29,
    "stable_2019_pct": 1.52,
    "stable_2025_pct": 2.31,
    "stable_change_pp": 0.5,
    "stable_centers_with_increase_pct": 63.87
  },
  "series": {
    "by_hour": [
      {
        "hour": 6,
        "centers": 266,
        "reservations": 546586,
        "lost_records": 17101,
        "median_pct": 2.39
      },
      {
        "hour": 7,
        "centers": 1188,
        "reservations": 2672712,
        "lost_records": 87843,
        "median_pct": 2.86
      },
      {
        "hour": 8,
        "centers": 1499,
        "reservations": 2681986,
        "lost_records": 87668,
        "median_pct": 2.61
      },
      {
        "hour": 9,
        "centers": 1880,
        "reservations": 5272216,
        "lost_records": 149181,
        "median_pct": 2.37
      },
      {
        "hour": 10,
        "centers": 1821,
        "reservations": 4015557,
        "lost_records": 117991,
        "median_pct": 2.28
      },
      {
        "hour": 11,
        "centers": 1275,
        "reservations": 1774303,
        "lost_records": 49660,
        "median_pct": 1.93
      },
      {
        "hour": 12,
        "centers": 784,
        "reservations": 743221,
        "lost_records": 18156,
        "median_pct": 1.56
      },
      {
        "hour": 13,
        "centers": 552,
        "reservations": 690965,
        "lost_records": 16497,
        "median_pct": 1.79
      },
      {
        "hour": 14,
        "centers": 649,
        "reservations": 944910,
        "lost_records": 23341,
        "median_pct": 2.01
      },
      {
        "hour": 15,
        "centers": 622,
        "reservations": 861391,
        "lost_records": 23711,
        "median_pct": 2.19
      },
      {
        "hour": 16,
        "centers": 1257,
        "reservations": 2139694,
        "lost_records": 64293,
        "median_pct": 2.27
      },
      {
        "hour": 17,
        "centers": 1928,
        "reservations": 5298794,
        "lost_records": 147867,
        "median_pct": 2.27
      },
      {
        "hour": 18,
        "centers": 2039,
        "reservations": 6851619,
        "lost_records": 190633,
        "median_pct": 2.3
      },
      {
        "hour": 19,
        "centers": 2071,
        "reservations": 7093219,
        "lost_records": 206594,
        "median_pct": 2.4
      },
      {
        "hour": 20,
        "centers": 1850,
        "reservations": 4865701,
        "lost_records": 142950,
        "median_pct": 2.35
      },
      {
        "hour": 21,
        "centers": 796,
        "reservations": 1313632,
        "lost_records": 41261,
        "median_pct": 2.5
      }
    ],
    "by_weekday": [
      {
        "weekday": "Lunes",
        "centers": 2122,
        "reservations": 9273686,
        "lost_records": 244991,
        "median_pct": 2.28
      },
      {
        "weekday": "Martes",
        "centers": 2119,
        "reservations": 9796096,
        "lost_records": 266050,
        "median_pct": 2.25
      },
      {
        "weekday": "Miércoles",
        "centers": 2127,
        "reservations": 9798526,
        "lost_records": 274471,
        "median_pct": 2.35
      },
      {
        "weekday": "Jueves",
        "centers": 2123,
        "reservations": 9370317,
        "lost_records": 282332,
        "median_pct": 2.5
      },
      {
        "weekday": "Viernes",
        "centers": 2018,
        "reservations": 7278990,
        "lost_records": 236319,
        "median_pct": 2.74
      },
      {
        "weekday": "Sábado",
        "centers": 1358,
        "reservations": 2076765,
        "lost_records": 72399,
        "median_pct": 2.53
      },
      {
        "weekday": "Domingo",
        "centers": 240,
        "reservations": 285220,
        "lost_records": 10196,
        "median_pct": 2.0
      }
    ],
    "by_year": [
      {
        "year": 2019,
        "centers": 312,
        "reservations": 4985160,
        "lost_records": 105067,
        "median_pct": 1.53
      },
      {
        "year": 2020,
        "centers": 507,
        "reservations": 7409069,
        "lost_records": 138432,
        "median_pct": 1.44
      },
      {
        "year": 2021,
        "centers": 759,
        "reservations": 14755062,
        "lost_records": 384200,
        "median_pct": 2.02
      },
      {
        "year": 2022,
        "centers": 1020,
        "reservations": 20512506,
        "lost_records": 557638,
        "median_pct": 2.22
      },
      {
        "year": 2023,
        "centers": 1329,
        "reservations": 27146502,
        "lost_records": 748970,
        "median_pct": 2.31
      },
      {
        "year": 2024,
        "centers": 1776,
        "reservations": 37001674,
        "lost_records": 1038657,
        "median_pct": 2.37
      },
      {
        "year": 2025,
        "centers": 2136,
        "reservations": 47895987,
        "lost_records": 1387035,
        "median_pct": 2.42
      }
    ]
  },
  "privacy": {
    "personal_identifiers_exported": false,
    "center_identifiers_exported": false,
    "minimum_centers_per_group": 20,
    "minimum_observations_per_group": 500
  },
  "limitations": [
    "Los datos no separan cancelación tardía de ausencia sin aviso; ambos resultados pierden el crédito.",
    "Las comparaciones son descriptivas y no prueban que el horario o el día causen la ausencia.",
    "La muestra incluye centros activos que usan WodBuster y no es un censo de todo el mercado español.",
    "Los cambios temporales pueden reflejar también cambios de política, registro y composición de clientes."
  ],
  "absence_concentration": {
    "status": "validated",
    "period": "2025-01-01/2025-12-31",
    "sample": {
      "status": "READY",
      "tenants_attempted": 2174,
      "tenants_succeeded": 2174,
      "tenants_failed": 0,
      "centers_with_profiles": 2161,
      "participant_profiles": 721690,
      "reservation_records": 47900444,
      "lost_credit_events": 1387079
    },
    "definition": {
      "event": "Reserva finalizada sin asistencia y sin devolución del crédito; puede ser una cancelación tardía o una ausencia sin aviso.",
      "repeat_profile": "Perfil con tres o más eventos durante 2025.",
      "center_balancing": "Cada centro elegible pesa una vez mediante proporciones calculadas dentro del centro."
    },
    "primary": {
      "minimum_reservations_per_profile": 1,
      "centers": 1625,
      "participant_profiles": 627686,
      "reservations": 43041679,
      "lost_credit_events": 1365464,
      "profiles_with_three_or_more_events_share_pct": {
        "p25": 11.61,
        "median": 22.07,
        "p75": 32.58
      },
      "events_from_profiles_with_three_or_more_share_pct": {
        "p25": 64.47,
        "median": 77.86,
        "p75": 86.37
      },
      "bootstrap_95_ci_event_share_pct": [
        76.96,
        78.72
      ]
    },
    "sensitivity": [
      {
        "minimum_reservations_per_profile": 1,
        "centers": 1625,
        "participant_profiles": 627686,
        "reservations": 43041679,
        "lost_credit_events": 1365464,
        "profiles_with_three_or_more_events_share_pct": {
          "p25": 11.61,
          "median": 22.07,
          "p75": 32.58
        },
        "events_from_profiles_with_three_or_more_share_pct": {
          "p25": 64.47,
          "median": 77.86,
          "p75": 86.37
        },
        "bootstrap_95_ci_event_share_pct": [
          76.96,
          78.72
        ]
      },
      {
        "minimum_reservations_per_profile": 10,
        "centers": 1536,
        "participant_profiles": 469516,
        "reservations": 42038276,
        "lost_credit_events": 1324345,
        "profiles_with_three_or_more_events_share_pct": {
          "p25": 16.67,
          "median": 28.48,
          "p75": 41.15
        },
        "events_from_profiles_with_three_or_more_share_pct": {
          "p25": 67.71,
          "median": 79.99,
          "p75": 87.82
        },
        "bootstrap_95_ci_event_share_pct": [
          79.04,
          80.69
        ]
      },
      {
        "minimum_reservations_per_profile": 20,
        "centers": 1424,
        "participant_profiles": 382163,
        "reservations": 40142905,
        "lost_credit_events": 1257617,
        "profiles_with_three_or_more_events_share_pct": {
          "p25": 20.21,
          "median": 34.08,
          "p75": 47.44
        },
        "events_from_profiles_with_three_or_more_share_pct": {
          "p25": 71.36,
          "median": 82.44,
          "p75": 89.73
        },
        "bootstrap_95_ci_event_share_pct": [
          81.71,
          83.32
        ]
      }
    ],
    "event_bands": [
      {
        "event_band": "0",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 35.93,
          "median": 47.67,
          "p75": 61.11
        },
        "event_share_pct": {
          "p25": 0.0,
          "median": 0.0,
          "p75": 0.0
        }
      },
      {
        "event_band": "1",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 15.65,
          "median": 18.31,
          "p75": 20.82
        },
        "event_share_pct": {
          "p25": 6.17,
          "median": 10.57,
          "p75": 19.26
        }
      },
      {
        "event_band": "2",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 7.33,
          "median": 9.61,
          "p75": 11.68
        },
        "event_share_pct": {
          "p25": 7.13,
          "median": 11.02,
          "p75": 16.22
        }
      },
      {
        "event_band": "3–4",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 6.31,
          "median": 9.74,
          "p75": 12.95
        },
        "event_share_pct": {
          "p25": 12.88,
          "median": 17.35,
          "p75": 22.45
        }
      },
      {
        "event_band": "5–9",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 3.74,
          "median": 7.97,
          "p75": 12.24
        },
        "event_share_pct": {
          "p25": 19.76,
          "median": 25.36,
          "p75": 30.38
        }
      },
      {
        "event_band": "10 o más",
        "centers": 1625,
        "profile_share_pct": {
          "p25": 1.04,
          "median": 3.35,
          "p75": 7.6
        },
        "event_share_pct": {
          "p25": 14.55,
          "median": 29.43,
          "p75": 45.11
        }
      }
    ],
    "quality": {
      "all_tenants_reconciled": true,
      "center_balanced_primary": true,
      "largest_center_event_volume_share_pct": 0.64,
      "personal_or_center_identifiers_exported": false
    },
    "limitations": [
      "El resultado no separa cancelación tardía de ausencia sin aviso.",
      "Un perfil con más reservas tiene más oportunidades de acumular eventos; las sensibilidades por actividad reducen, pero no eliminan, esta diferencia de exposición.",
      "La concentración describe dónde aparece el resultado y no demuestra que una intervención segmentada lo reduzca.",
      "La muestra cubre centros activos que usan WodBuster y no es un censo de todo el mercado español."
    ]
  }
}