Table 1 Univariate analysis of case definition A
From: Cumulative keyboard strokes: a possible risk factor for carpal tunnel syndrome
Risk factor | CTS case definition A | RR (95 % CI) |
|---|---|---|
n/total (%) | ||
Age | ||
> = 45 | 31/233 (13.3) | 1.38 (0.81-2.35) |
< 45 | 20/208 (9.6) | |
BMI | ||
> = 25 | 28/212 (13.2) | 1.22 (0.72-2.06) |
< 25 | 22/204 (10.8) | |
Smoking | ||
Ever-smoker | 28/181(15.5) | 1.74 (1.02-2.93)* |
Non- smoker | 22/247 (8.9) | |
Physical activity | ||
Yes | 8/144 (5.6) | 0.40 (0.19-0.84) |
No | 43/317 (13.6) | |
Rheumatoid Arthritis | ||
Yes | 2/8 (25.0) | 2.32 (0.67-7.89) |
No | 49/453 (10.8) | |
Diabetes Mellitus | 0/11 (0) | NA |
Yes | 51/450 (11.3) | |
No | ||
Hypothyroidism | ||
Yes | 7/42 (16.7) | 1.58 (0.76-3.29) |
No | 44/419 (10.5) | |
Hyperthyroidism | ||
Yes | 0/14 (0) | NA |
No | 51/447 (11.4) | |
Total keyboard strokes-years | ||
> =240500000 | 31/174 (17.8) | 2.38 (1.38-4.12)** |
<240500000 | 18/241 (7.5) |