Table 3.

Work posture and varicose vein (logistic regression)

Work posture (h)	Crude OR (95% CI)∗	Adjusted OR (95% CI)†
Stand (mean: 1.81)
Stand < 2	1 (reference)	1 (reference)
2 ≤ Stand < 4	1.14 (0.60–2.16)	1.03 (0.53–2.00)
4 ≤ Stand	1.67 (0.84–3.32)	1.53 (0.75–3.14)
Walk (mean: 4.87)
Walk < 2	1 (reference)	1 (reference)
2 ≤ Walk < 4	0.95 (0.29–3.16)	0.92 (0.27–3.14)
4 ≤ Walk	1.40 (0.47–4.19)	1.70 (0.55–5.22)
Up (stand + walk) (mean: 6.50)
Up ≤ 4	1 (reference)	1 (reference)
4 < Up	2.80 (1.08–7.25)	3.40 (1.27–9.09)
Sit (mean: 2.20)
Sit < 2	1 (reference)	1 (reference)
2 ≤ Sit < 4	0.82 (0.43–1.55)	0.64 (0.33–1.25)
4 ≤ Sit	0.72 (0.36–1.45)	0.58 (0.27–1.21)
Rest (mean: 0.23)
Stand < 0.2	1 (reference)	1 (reference)
0.2 ≤ Stand	0.93 (0.53–1.64)	0.92 (0.51–1.66)

CI, confidence interval; OR, odds ratio.

^∗Univariate logistic regression.

^†Multiple logistic regression (adjusted for age, pregnancy, stocking period).