Table 1 Baseline descriptive statistics of demographic and interview data for ELSA respondents included in analyses of cognitive function in both the national and London sub-studies
England-wide ELSA participants | London-wide ELSA respondents | |
|---|---|---|
Number of participants | 8,883 | 768 |
Number of interviews provided, mean ± SD | 5.70 ± 2.29 | 5.63 ± 2.26 |
Years of follow-up, mean ± SD | 10.04 ± 4.56 | 10.10 ± 4.57 |
Sex | ||
Women, n (%) | 4,897 (55.1%) | 438 (57%) |
Men, n (%) | 3,986 (44.9%) | 330 (43%) |
Age at recruitment (years), mean ± SD | 64.40 ± 9.75 | 64.40 ± 10.18 |
Physical activity | ||
Sedentary, n (%) | 1,996 (22.5%) | 214 (27.9%) |
Moderately active, n (%) | 3,938 (44.3%) | 343 (44.6%) |
Very active, n (%) | 2,946 (33.2%) | 211 (27.5%) |
Smoking status | ||
Never smoked, n (%) | 3,217 (36.2%) | 283 (36.8%) |
Former smoker, n (%) | 4,115 (46.3%) | 330 (43%) |
Current smoker, n (%) | 1,551 (17.5%) | 155 (20.2%) |
Age left full-time education (n participants) | 3,825 | 319 |
14 or younger/Never went, n (%) | 416 (10.9%) | 40 (12.5%) |
At 15, n (%) | 1,363 (35.6%) | 91 (28.5%) |
At 16, n (%) | 809 (21.2%) | 51 (16%) |
At 17, n (%) | 333 (8.7%) | 35 (11%) |
At 18, n (%) | 251 (6.6%) | 29 (9.1%) |
19 or older, n (%) | 653 (17%) | 73 (22.9%) |