Table 1 Baseline characteristics of analytic and excluded samples
From: The impact of physical activity on healthy ageing trajectories: evidence from eight cohort studies
|  |  | Analytic sample (N = 130,521) | Excluded sample (N = 78,279) | t / χ2 | Effect size |
|---|---|---|---|---|---|
Age, M (SD) | Â | 62.80 (10.06) | 62.31 (11.68) | 10.29*** | 0.05 |
Gender, N (%) | Female | 72,312 (55.40) | 40,632 (51.91) | 0.32 | 0.001 |
Male | 58,063 (44.49) | 32,453 (41.46) | |||
Missing | 146 (0.11) | 5194 (6.64) | – | – | |
Wealth, N (%) | 1st quintile | 26,406 (20.23) | 13,702 (17.50) | 266.04*** | 0.04 |
2nd quintile | 25,419 (19.48) | 13,064 (16.69) | |||
3rd quintile | 24,760 (18.97) | 13,663 (17.45) | |||
4th quintile | 24,040 (18.42) | 14,162 (18.09) | |||
5th quintile | 23,657 (18.13) | 14,892 (19.02) | |||
Missing | 6239 (4.78) | 8796 (11.24) | – | – | |
Education, N (%) | Less than primary/primary | 43,469 (33.3) | 22,181 (28.34) | 488.55*** | 0.05 |
Secondary | 62,821 (48.13) | 38,425 (49.09) | |||
Tertiary | 21,834 (16.73) | 14,666 (18.74) | |||
Missing | 2397 (1.84) | 3007 (3.84) | – | – | |
Study, N (%) | ALSA | 1843 (1.41) | 244 (0.31) | 27,000*** | 0.36 |
ELSA | 14,483 (11.1) | 4006 (5.12) | |||
ENRICA | 2513 (1.93) | 6 (0.01) | |||
HRS | 32,934 (25.23) | 4382 (5.60) | |||
JSTAR | 3695 (2.83) | 3573 (4.56) | |||
KLOSA | 8928 (6.84) | 1326 (1.69) | |||
MHAS | 12,647 (9.69) | 8719 (11.14) | |||
SHARE | 53,478 (40.97) | 56,023 (71.57) | |||
Health score, M (SD) |  | 70.21 (16.46) | 70.38 (17.81) | −2.05* | −0.0004 |
Physical activity (aggregated), N (%) | No | 49,622 (38.02) | 21,999 (28.10) | 1300*** | 0.08 |
Yes | 80,001 (61.29) | 50,555 (64.58) | |||
Missing | 1397 (0.69) | 5725 (7.31) | – | – | |
Frequency of vigorous physical activity, N (%) | Never | 42,244 (32.37) | 26,326 (33.63) | 3300*** | 0.15 |
Once per week | 20,738 (15.89) | 12,865 (16.43) | |||
2/3 per week | 7129 (5.46) | 882 (1.13) | |||
4+ per week | 23,789 (18.23) | 19,278 (24.63) | |||
Missing | 36,621 (28.06) | 18,928 (24.18) | – | – | |
Frequency of less vigorous physical activity, N (%) | Never | 11,751 (9.00) | 8371 (10.69) | 5100*** | 0.19 |
Once per week | 16,840 (12.90) | 11,984 (15.31) | |||
2/3 per week | 10,311 (7.90) | 1145 (1.46) | |||
4+ per week | 44,556 (34.14) | 36,324 (46.40) | |||
Missing | 47,063 (36.06) | 20,455 (26.13) | – | – | |
Ever smoker*, N (%) | No | 62,168 (47.63) | 40,439 (51.66) | 487.34*** | 0.05 |
Yes | 66,817 (51.19) | 35,508 (45.36) | |||
Missing | 1536 (1.18) | 2332 (2.98) | – | – | |
Ever drinker*, N (%) | No | 39,019 (29.89) | 29,797 (38.07) | 1800*** | 0.09 |
Yes | 91,023 (69.74) | 46,260 (59.10) | |||
Missing | 479 (0.37) | 2222 (2.84) | – | – |