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Table 2 Logistic regression for occupational cold exposure in relation to reporting symptoms of carpal tunnel syndrome

From: Occupational cold exposure and symptoms of carpal tunnel syndrome – a population-based study

Exposure variable

Exposure level

Carpal tunnel syndrome

References

Simple analyses

Multiple analyses a

 

Proportion of working hours

N (%)

N (%)

Crude OR (95% CI)

Adjusted OR (95% CI)

Contact cooling

Never

254 (63.3)

2,869 (73.9)

Reference

Reference

One tenth

74 (18.5)

645 (16.6)

1.30 (0.99–1.70)

1.19 (0.87–1.63)

One quarter

28 (7.0)

182 (4.7)

1.74 (1.14–2.64)

1.60 (0.99–2.56)

Half

16 (4.0)

82 (2.1)

2.20 (1.27–3.82)

1.92 (1.04–3.57)

Three quarters

15 (3.7)

62 (1.6)

2.73 (1.53–4.87)

2.38 (1.26–4.52)

Almost always

14 (3.5)

42 (1.1)

3.77 (2.03–6.99)

3.20 (1.62–6.33)

Ambient cooling

Never

227 (56.2)

2,470 (63.6)

Reference

Reference

One tenth

82 (20.3)

766 (19.7)

1.17 (0.89–1.52)

1.14 (0.85–1.53)

One quarter

48 (11.9)

329 (8.5)

1.59 (1.14–2.21)

1.57 (1.09–2.27)

Half

21 (5.2)

187 (4.8)

1.22 (0.76–1.96)

1.11 (0.66–1.86)

Three quarters

13 (3.2)

68 (1.8)

2.08 (1.13–3.82)

2.10 (1.10–4.01)

Almost always

13 (3.2)

64 (1.6)

2.21 (1.20–4.07)

2.00 (1.03–3.88)

Severe ambient cooling

Never

231 (57.5)

2,723 (70.2)

Reference

Reference

One tenth

81 (20.1)

740 (19.1)

1.29 (0.99–1.68)

1.35 (1.01–1.82)

One quarter

41 (10.2)

198 (5.1)

2.44 (1.70–3.51)

2.45 (1.65–3.64)

Half

22 (5.5)

119 (3.1)

2.18 (1.36–3.50)

2.00 (1.18–3.40)

Three quarters

10 (2.5)

57 (1.5)

2.07 (1.04–4.10)

2.09 (1.02–4.27)

Almost always

17 (4.2)

43 (1.1)

4.66 (2.62–8.30)

4.02 (2.09–7.71)

  1. OR odds ratio, NRS numerical rating scale, 95% CI ninety-five percent confidence interval
  2. aAdjusted for age, gender, body mass index, current daily smoking, diabetes mellitus, joint disease, and hand-arm vibration exposure
  3. Bold values are significant at the 0.05 level