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Table 2 Measures, operationalisation and timing of data collection

From: Early detection of health problems in potentially frail community-dwelling older people by general practices - project [G]OLD: design of a longitudinal, quasi-experimental study

Measures

Operationalisation

No. of items

Range score*

Timing data collection†

Primary outcomes

    

 Health-related quality of life

RAND-36 [35, 36]

36

N/A

T0, T1, T2, T3

 Disability

GARS [37]

18

18–72

T0, T1, T2, T3

 IADL

11

11-44

 

 ADL

7

7–28

 

Secondary outcomes

    

 Attitude towards ageing

Subscale attitude toward own ageing - PGC Morale Scale [40]

5

0–5

T0, T1, T2, T3

 Health care utilisation

Number of contacts with different health care providers (i.e., GP consultations, hospital admission)

3

N/A

T0

N/A

N/A

CR_GP and CR_E

 Admission to nursing home or  home for older people

Number of admissions and time to admission from T0 to T3

N/A

N/A

CR_GP

 Mortality

Number of deaths from T0 to T3

N/A

N/A

CR_GP

  1. * Underlined scores indicate the most favourable scores. N/A means not applicable.
  2. † T0 = postal questionnaire at the start of the study; T1 = postal questionnaire at 6-months follow-up; T2 = postal questionnaire at 12-months follow-up; T3 = postal questionnaire at 18-months follow-up; CR_GP = continuous registration during study in GP’s Information System; CR_E = continuous registration during study by older people in [G]OLD care booklet.