{
  "@type": "PropertyValue",
  "name": "hads_a",
  "description": "HADS anxiety subscale: sum of the 7 anxiety items",
  "valueType": "int",
  "subscale": "anxiety",
  "minValue": 0,
  "maxValue": 21,
  "var": ["hads_01", "hads_03", "hads_05", "hads_07", "hads_09",  "hads_11", "hads_13"]
}