Table 3.
Distributions of demographic and clinical characteristics (N=711), with univariate analyses of associations with incident CTS
| Overall | CTS (N=31) | No CTS (N=680) | OR (95% CI) | p | |
|---|---|---|---|---|---|
| Mean (Std) | Mean (Std) | Mean (Std) | |||
| Age | 30.6 (10.5) | 34.3 (12.0) | 30.5 (10.4) | 1.03 (1.00, 1.06) | 0.05 |
| Body mass index (kg/m2) | 28.2 (6.2) | 31.6 (7.5) | 28.0 (6.1) | 1.08 (1.03, 1.13) | <0.01 |
| Years of follow-up | 3.3 (0.9) | 3.0 (0.7) | 3.3 (0.9) | 0.62 (0.38, 1.01) | 0.06 |
| Handling and moving objects (0–7 scale) | |||||
| Most recent job | 4.1 (1.5) | 4.2 (1.4) | 4.1 (1.5) | 1.16 (0.89, 1.51) | 0.27 |
| Weighted by employed time | 4.1 (1.5) | 4.2 (1.3) | 4.1 (1.5) | 1.10 (0.82, 1.46) | 0.53 |
| Wrist and finger speed (0–7 scale) | |||||
| Most recent job | 1.3 (1.0) | 1.2 (1.0) | 1.3 (1.0) | 1.21 (0.71, 2.05) | 0.48 |
| Weighted by employed time | 1.3 (0.9) | 1.2 (1.0) | 1.3 (0.9) | 0.96 (0.59, 1.58) | 0.88 |
| Time spent making repetitive motions (0–5 scale) | |||||
| Most recent job | 3.6 (0.6) | 3.9 (0.5) | 3.5 (0.6) | 3.62 (1.45, 9.07) | 0.006 |
| Weighted by employed time | 3.6 (0.5) | 3.8 (0.5) | 3.6 (0.5) | 2.95 (1.07, 8.15) | 0.04 |
| Time spent using your hands to handle, control, or feel objects (0–5 scale) | |||||
| Most recent job | 3.8 (0.9) | 4.1 (0.8) | 3.8 (0.9) | 1.65 (0.97, 2.80) | 0.06 |
| Weighted by employed time | 3.9 (0.9) | 4.0 (0.8) | 3.8 (0.9) | 1.35 (0.85, 2.16) | 0.31 |
|
| |||||
| N (%) | N (%) | N (%) | |||
|
| |||||
| Female gender | 253 (35.6) | 13 (41.9) | 240 (35.3) | 1.32 (0.64, 2.75) | 0.45 |
| Diabetes Mellitus | 24 (3.4) | 2 (6.5) | 22 (3.2) | 2.06 (0.46, 9.20) | 0.34 |
| Arthritis (osteoarthritis or rheumatoid arthritis) | 44 (6.2) | 2 (6.5) | 42 (6.2) | 1.05 (0.24, 4.54) | 0.95 |
| Hand symptoms in one or more fingers | 75 (10.6) | 31 (100) | 44 (6.5) | n/a | n/a |
| Abnormal nerve conduction study | 163 (22.9) | 31 (100) | 132 (19.4) | n/a | n/a |
| Abnormal DML | 89 (12.5) | 16 (51.6) | 73 (10.7) | n/a | n/a |
| Abnormal DSL | 117 (16.5) | 25 (80.7) | 92 (13.5) | n/a | n/a |
| Abnormal MUDS | 91 (12.8) | 22 (71.0) | 69 (10.2) | n/a | n/a |
| Dynamic strength important to job | |||||
| Most recent job | 531 (74.7) | 28 (90.3) | 499 (73.4) | 2.95 (0.93, 9.38) | 0.07 |
| Weighted by employed time | 527 (74.1) | 28 (90.3) | 500 (73.5) | 2.95 (0.91, 9.55) | 0.07 |
| Static strength important to job | |||||
| Most recent job | 472 (66.4) | 27 (87.1) | 445 (65.4) | 3.24 (1.11, 9.51) | 0.03 |
| Weighted by employed time | 470 (66.1) | 27 (87.1) | 442 (65.0) | 3.28 (1.09, 9.87) | 0.03 |
CTS = carpal tunnel syndrome; DML = distal motor latency; DSL= distal sensory latency; MUDS = sensory median ulnar difference