Current Gerontology and Geriatrics Research / 2009 / Article / Tab 1

Research Article

The Psychometric Properties of the Older People's Quality of Life Questionnaire, Compared with the CASP-19 and the WHOQOL-OLD

Table 1

OPQOL, CASP-19, and WHOQOL-OLD distributions. NB. 3 additional OPQOL items were generated by Ethnibus focus groups which were too late to be included in the QoL follow-up survey, but were included in the ONS Omnibus and Ethnibus Surveys.

Ethnibus survey (ethnically diverse British pop. aged 65+)ONS Omnibus survey (British pop. aged 65+)QoL follow-up survey (ONS Omnibus sample of British pop. aged 65+ in 1999/2000 refollowed up when aged 74+)

OPQOL TOTAL [ethnibus, ONS Omnibus 35 items; 5-point scale (1–5) range 35–175; QoL followup: 32 items, range 32–160)]% (n)% (n)% (n)
≤ 99 QoL bad as can be 6 (24) 1 (6) 7 (17)
100–119 67 (266) 11 (64)38 (96)
120–139 25 (100) 52 (289)43 (108)
140–159 2 (9) 32 (178)12 (29)
160–175 QoL good as can be –- (1) 4 (23)–-
Mean (standard deviation)114.538 (10.718)134.730 (14.243)121.385 (14.048)
Cronbach’s alpha of internal consistency (reliability)0.7480.8760.901
No. responses400 560 250
Casp-19 TOTAL [19 items; 5-point (0–3) scale range 0–57]
≤19 absence of QoL –- (2) 1 (5) n/a
20–29 23 (92) 7 (38)
30–39 68 (271)27 (158)
40–49 8 (32)46 (265)
50–57 satisfaction in all domains 1 (3)19 (107)
Mean (standard deviation)33.235 (5.103)41.836 (8.120)
Cronbach’s alpha of internal consistency (reliability)0.5530.866n/a
No. responses400 573
WHOQOL-OLD TOTAL [24 items; 5-point (1–5) scale range 24–120]
≤69 lowest possible QoL 2 (6) 4 (22) n/a
70–7923 (94)11 (58)
80–8958 (234)24 (130)
90–9915 (59)40 (182)
100–120 the highest possible QoL 2 (7)27 (144)
Mean (standard deviation)83.488 (6.547)91.925 (11.764)
Cronbach’s alpha of internal consistency (reliability)0.4150.849n/a
N. responses400 536

n/a: not asked in QoL follow-up survey as additional scales were judged to be too burdensome in the postal administration survey.
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