Your privacy, your choice

We use essential cookies to make sure the site can function. We also use optional cookies for advertising, personalisation of content, usage analysis, and social media.

By accepting optional cookies, you consent to the processing of your personal data - including transfers to third parties. Some third parties are outside of the European Economic Area, with varying standards of data protection.

See our privacy policy for more information on the use of your personal data.

for further information and to change your choices.

Skip to main content

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

From: Exposure to ambient air pollution and cognitive function: an analysis of the English Longitudinal Study of Ageing cohort

 

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%)