Table 3.
Known groups and discriminant validity results
| Adults ( < 65 years of age, n = 940) | Older adults (65 and over, n = 812) | |||||||
|---|---|---|---|---|---|---|---|---|
| Variables | n(%) | Mean difference | P(#) | cohen’s d | n (%) | Mean difference | P(#) | cohen’s d |
| Gender (male) | 138 (14.7) | −1.6 | 0.387 | 0.06 | 339 (41.7) | 7.7 | 0.000 | 0.39 |
| Education (primary and over) | 860 (91.8) | 3.3 | 0.159 | 0.09 | 610 (75.0) | 10.8 | 0.000 | 0.70 |
| Marital status (single) | 256 (27.3) | −1.4 | 0.343 | 0.06 | 352 (43.3) | −8.2 | 0.000 | 0.42 |
| Income (inadequate) | 299 (31.9) | −4.0 | 0.004 | 0.19 | 140 (17.2) | −9.6 | 0.000 | 0.68 |
| Presence of any chronic illness (no illness) | 376 (57.8) | 5.5 | 0.000 | 0.31 | 147 (18.1) | 6.8 | 0.000 | 0.26 |
| Smoking (no) | 458 (72.6) | 0.2 | 0.922 | 0.01 | 671 (83.1) | −5.5 | 0.005 | 0.20 |
| Alcohol intake (no) | 345 (55.6) | −0.5 | 0.750 | 0.03 | 750 (93.1) | −10.5 | 0.000 | 0.26 |
| Exercise (at least once a week) | 189 (29.0) | 3.1 | 0.065 | 0.14 | 424 (52.3) | 13.1 | 0.000 | 0.69 |
| Sleep problem (no problem) | 236 (37.9) | 6.6 | 0.000 | 0.33 | 333 (41.3) | 6.8 | 0.000 | 0.33 |
| Body Mass Index ( > 30.0) | 180 (29.6) | −7.1 | 0.000 | 0.34 | 149 (23.2) | −4.5 | 0.030 | 0.29 |
| Social relations (satisfied) | 378 (64.2) | −0.8 | 0.601 | 0.04 | 651 (88.1) | 13.6 | 0.000 | 0.44 |
| Psychological status (good-satisfied) | 492 (93.7) | 12.6 | 0.001 | 0.29 | 151 (91.5) | 10.7 | 0.024 | 0.36 |
| Perceived health (medium-poor) | 187 (22.8) | −3.2 | 0.021 | 0.17 | ||||
(Cohen, 1988b).