Table 2 Univariable and multivariable hazard ratios (HR) with 95% confidence intervals (CI) of hospitalization for ulnar nerve entrapment in total study sample (N = 6325).

From: Work-related risk factors for ulnar nerve entrapment in the Northern Finland Birth Cohort of 1966

Characteristic N Cases Univariable Multivariable
HR 95% CI HR* 95% CI
Sex
Men 3259 35 1    
Women 3066 29 0.88 0.54–1.44   
Occupational class
Upper clerical workers 1483 5 1   1  
Lower clerical workers 2213 20 2.71 1.02–7.22 2.17 0.81–5.83
Entrepreneurs 482 9 5.62 1.88–16.75 3.68 1.20–11.27
Farmers or manual workers 2147 30 4.20 1.63–10.83 2.23 0.82–6.06
Body mass index
Normal 3886 36 1    
Overweight/obese 2439 28 1.24 0.76–2.04   
Smoking
No 3244 17 1   1  
Yes 3081 47 2.97 1.71–5.17 2.51 1.43–4.41
Diabetes
No 6248 64 NA    
Yes 77 0     
Thyroid disease
No 6210 60 1   1  
Yes 115 4 3.57 1.30–9.82 4.14 1.50–11.44
Rheumatoid arthritis
No 6272 64 NA    
Yes 53 0     
Exposure to heat
None or light 5308 50 1    
Moderate or high 1017 14 1.47 0.81–2.66   
Exposure to cold
None or light 5460 49 1    
Moderate or high 865 15 1.96 1.19–3.49   
Exposure to temperature changes
None or light 4374 31 1   1  
Moderate or high 1951 33 2.40 1.47–3.92 1.72 1.00–2.93
Exposure to vibration to hands
None or light 5857 51 1   1  
Moderate or high 468 13 3.13 1.70–5.76 1.94 1.00–3.77
  1. *Adjusted for variables with P value ≤ 0.10.