{
  "version": "xarts.measurement-diagnostics/1",
  "family": "measurement-diagnostics",
  "provenance": {
    "legacyId": "bland-altman"
  },
  "document": {
    "header": {
      "title": "Coinciden de media, y de media no se trata a nadie",
      "subtitle": "Tensión sistólica en 26 pacientes: la diferencia entre el tensiómetro de muñeca y la auscultación, frente a la media de los dos",
      "source": "Estudio de validación ilustrativo · límites de acuerdo a ±1,96 desviaciones (Bland & Altman, Lancet 1986)"
    },
    "footer": {
      "source": "Estudio de validación ilustrativo, 26 pacientes de una consulta de hipertensión; una toma simultánea por paciente y método.",
      "notes": "El eje horizontal es la MEDIA de los dos métodos, no la auscultación: ninguno de los dos se supone exacto, y poner el método de referencia en el eje X fabrica una pendiente que no está en los datos. La línea sólida es el sesgo (la media de las diferencias) y las dos discontinuas los límites de acuerdo, sesgo ±1,96 desviaciones.",
      "alt": "Nube de 26 pares con la diferencia entre los dos aparatos en vertical. La línea del sesgo cae prácticamente sobre el cero (+0,6 mmHg) y los dos límites de acuerdo, en −13,0 y +14,2, encierran una banda de 27 mmHg. La nube baja de izquierda a derecha: la muñeca lee alto en los pacientes con la tensión baja y bajo en los que la tienen alta. Dos pares se salen de la banda, P-03 y P-07."
    },
    "spacing": {
      "horizontalPadding": 24,
      "topPadding": 22,
      "bottomPadding": 24,
      "minimumTextGap": 6
    }
  },
  "presentation": {
    "theme": "anlak",
    "dimensions": {
      "width": 940,
      "height": 587
    },
    "locale": "es-ES",
    "fonts": "reference",
    "surface": "theme",
    "framePadding": 24
  },
  "output": {
    "filename": "bland-altman",
    "embedSpec": true,
    "geometryDecimals": 2
  },
  "operation": "method-agreement",
  "data": {
    "design": "one-pair-per-subject",
    "measurement": {
      "label": "Tensiómetro de muñeca",
      "unit": "mmHg"
    },
    "reference": {
      "label": "Auscultación",
      "unit": "mmHg"
    },
    "rows": [
      {
        "id": "P-01",
        "label": "P-01",
        "measurement": 124,
        "reference": 124
      },
      {
        "id": "P-02",
        "label": "P-02",
        "measurement": 147,
        "reference": 142
      },
      {
        "id": "P-03",
        "label": "P-03",
        "measurement": 122,
        "reference": 107
      },
      {
        "id": "P-04",
        "label": "P-04",
        "measurement": 165,
        "reference": 164
      },
      {
        "id": "P-05",
        "label": "P-05",
        "measurement": 104,
        "reference": 96
      },
      {
        "id": "P-06",
        "label": "P-06",
        "measurement": 142,
        "reference": 136
      },
      {
        "id": "P-07",
        "label": "P-07",
        "measurement": 169,
        "reference": 186
      },
      {
        "id": "P-08",
        "label": "P-08",
        "measurement": 127,
        "reference": 118
      },
      {
        "id": "P-09",
        "label": "P-09",
        "measurement": 148,
        "reference": 152
      },
      {
        "id": "P-10",
        "label": "P-10",
        "measurement": 133,
        "reference": 130
      },
      {
        "id": "P-11",
        "label": "P-11",
        "measurement": 180,
        "reference": 176
      },
      {
        "id": "P-12",
        "label": "P-12",
        "measurement": 117,
        "reference": 111
      },
      {
        "id": "P-13",
        "label": "P-13",
        "measurement": 163,
        "reference": 168
      },
      {
        "id": "P-14",
        "label": "P-14",
        "measurement": 142,
        "reference": 146
      },
      {
        "id": "P-15",
        "label": "P-15",
        "measurement": 134,
        "reference": 127
      },
      {
        "id": "P-16",
        "label": "P-16",
        "measurement": 188,
        "reference": 191
      },
      {
        "id": "P-17",
        "label": "P-17",
        "measurement": 104,
        "reference": 102
      },
      {
        "id": "P-18",
        "label": "P-18",
        "measurement": 159,
        "reference": 156
      },
      {
        "id": "P-19",
        "label": "P-19",
        "measurement": 141,
        "reference": 139
      },
      {
        "id": "P-20",
        "label": "P-20",
        "measurement": 125,
        "reference": 121
      },
      {
        "id": "P-21",
        "label": "P-21",
        "measurement": 172,
        "reference": 181
      },
      {
        "id": "P-22",
        "label": "P-22",
        "measurement": 130,
        "reference": 133
      },
      {
        "id": "P-23",
        "label": "P-23",
        "measurement": 152,
        "reference": 160
      },
      {
        "id": "P-24",
        "label": "P-24",
        "measurement": 117,
        "reference": 114
      },
      {
        "id": "P-25",
        "label": "P-25",
        "measurement": 161,
        "reference": 172
      },
      {
        "id": "P-26",
        "label": "P-26",
        "measurement": 151,
        "reference": 149
      }
    ]
  },
  "calculation": {
    "difference": "measurement-minus-reference",
    "scale": "absolute",
    "mean": "arithmetic-pair",
    "deviation": "sample-n-minus-one",
    "limitMultiplier": 1.96,
    "minimumPairs": 5,
    "constantDifference": "reject",
    "xPadding": 0.06,
    "yPadding": 0.1
  },
  "layout": {
    "margin": {
      "top": 30,
      "right": 24,
      "bottom": 56,
      "left": 48
    },
    "xTicks": 6,
    "yTicks": 6,
    "maxAxisHeight": 88,
    "maxStatisticWidth": 104,
    "maxLineLabelWidth": 210,
    "statisticGap": 10,
    "edgeGap": 6,
    "notesGap": 16,
    "axisInkPadding": 0,
    "statisticExportMeasurement": "basic-pairs",
    "exportTextMeasurement": "glyph-advances",
    "axisMeasurementNumerals": "proportional-nums"
  },
  "marks": {
    "point": {
      "color": "series.blue",
      "radius": 4.5,
      "opacity": 0.72,
      "stroke": "surface",
      "strokeWidth": 1
    },
    "bias": {
      "color": "series.blue",
      "width": 2,
      "dash": ""
    },
    "limit": {
      "color": "series.blue",
      "width": 1.5,
      "dash": "6 4"
    },
    "zero": {
      "color": "textMuted",
      "width": 1,
      "dash": "1 3"
    },
    "band": {
      "color": "series.blue",
      "opacity": 0.09
    },
    "outlier": {
      "color": "accent",
      "width": 2,
      "ringGap": 3.5,
      "labelGap": 5,
      "maxLabelWidth": 148
    }
  },
  "labels": {
    "upper": "límite superior de acuerdo",
    "bias": "sesgo medio",
    "lower": "límite inferior de acuerdo",
    "difference": "Diferencia",
    "meanAxis": "Media de los dos métodos",
    "relativeAxis": "Diferencia (% de la media del par)",
    "outside": "fuera de los límites",
    "limits": "límites a",
    "deviation": "DE",
    "statisticFontSize": 11,
    "lineFontSize": 10,
    "noteFontSize": 11,
    "outlierFontSize": 11,
    "outlierFontWeight": 600,
    "statisticColor": "textPrimary",
    "lineColor": "textMuted",
    "outlierColor": "textPrimary",
    "annotationFontSize": 12
  },
  "interaction": {
    "tooltip": true
  },
  "annotations": [
    {
      "id": "p07",
      "rowId": "P-07",
      "type": "pill",
      "label": "{reference} {unit} reales, {measurement} en la muñeca",
      "direction": "down",
      "leader": true,
      "offset": [
        -200,
        6
      ]
    }
  ]
}