Table 3.

Occupational physical activity and incident transient ischemic attack (N=274). Hazard ratios (HR) and 95% confidence intervals (CI) from Cox regression analyses with incremental adjustment for potential confounders. Sister Study, 2004–2015, N=31 270.

Occupational physical activity	N Case/ Exposed	Model 1 a		Model 2 b		Model 3 c		Model 4 d
		HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI
Current job
Mostly sitting	122/16119	1.00		1.00		1.00		1.00
Sitting and standing equally	64/6338	1.29	0.96–1.75	1.30	0.96–1.77	1.31	0.97–1.78	1.37	1.01–1.88
Mostly standing	50/4612	1.39	1.00–1.93	1.37	0.98–1.90	1.40	1.01–1.96	1.51	1.08–2.12
High intensity work	31/2453	1.71	1.15–2.54	1.55	1.04–2.31	1.52	1.02–2.27	1.57	1.04–2.38
Continuous walking/movements	28/2207	1.72	1.14–2.59	1.56	1.03–2.36	1.53	1.00–2.33	1.60	1.04–2.45
Heavy manual labor	3/246	1.64	0.52–5.15	1.49	0.47–4.71	1.43	0.45–4.51	1.36	0.43–4.35
Longest held job
Mostly sitting	127/14315	1.00		1.00		1.00		1.00
Sitting and standing equally	48/6525	0.79	0.57–1.10	0.82	0.59–1.14	0.82	0.59–1.15	0.84	0.60–1.17
Mostly standing	54/5485	1.08	0.79–1.49	1.01	0.74–1.40	1.03	0.75–1.42	0.88	0.62–1.24
High intensity work	38/3197	1.41	0.98–2.03	1.32	0.92–1.90	1.28	0.88–1.86	1.26	0.86–1.82
Continuous walking/movements	36/2795	1.52	1.05–2.20	1.43	0.99–2.07	1.39	0.95–2.03	1.37	0.93–2.00
Heavy manual labor	2/402	0.62	0.15–2.51	0.56	0.14–2.25	0.54	0.13–2.18	0.52	0.13–2.10

^aModel 1 adjusts for age.

^bModel 2 adjusts for age, leisure-time physical activity, alcohol, smoking, and body mass index.

^cModel 3 adjusts for age, leisure-time physical activity, alcohol, smoking, body mass index, discrimination at work, and night work.

^dModel 4 adjusts for age, leisure-time physical activity, alcohol, smoking, body mass index, discrimination at work, night work, and rate pressure product.