Table 1.

Presence of frailty at 2007–09, 2012–13, or 2015–16 visits, by sociodemographic characteristics in 6233 participants

		Individuals	Person-observations	Positive observations for frailty adjusted for sex and age (%)*	Odds ratio†(95% CI)
Total sample		6233	16 164	562 (4%)	..
Age group at fifth clinic (2007–09), years
	≤64	3235	8695	150 (2%)	Ref (1·0)
	65–69	1348	3526	128 (4%)	1·98 (1·51–2·59)
	70–74	1269	3102	193 (6%)	3·70 (2·89–4·74)
	≥75	381	841	91 (11%)	7·55 (5·44–10·5)
Sex
	Male	4456	11 691	289 (3%)	Ref (1·0)
	Female	1777	4473	273 (6%)	2·42 (1·98–2·96)
Ethnic origin
	White	5734	14 979	455 (3%)	Ref (1·0)
	South Asian	289	692	67 (8%)	2·95 (2·10–4·15)
	Black	166	379	27 (5%)	1·91 (1·17–3·11)
	Other	44	114	13 (9%)	3·58 (1·67–7·68)
Marital status
	Married or cohabiting	4662	12 198	341 (3%)	Ref (1·0)
	Single, divorced, or widowed	1253	3171	195 (6%)	2·13 (1·71–2·65)
	Missing	318	796	26	..
Socioeconomic status (last known grade at age 50 years)
	High	2677	7204	145 (2%)	Ref (1·0)
	Intermediate	2764	7119	241 (4%)	1·48 (1·16–1·88)
	Low	792	1841	176 (7%)	2·60 (1·89–3·58)

Data are n (%).

^*Age-adjusted (at the fifth clinic) and sex-adjusted prevalence of frailty for all characteristics. Values for sex are age-adjusted.

^†Odds ratios for each risk factor after multiple imputation for missing values, adjusted for age and age squared at the fifth clinic, time of frailty measure since fifth clinic, sex, and ethnic origin.