Table 4B.
Relationship between CTS severity and MHQ subscales
| n | Overall function Mean (SD) |
Estimate (95% CI)* | ADL unilateral Mean (SD) |
Estimate (95% CI)* | ADL bilateral Mean (SD) |
Estimate (95% CI)* | Work Mean (SD) |
Estimate (95% CI)* | |
| CTS-6 score | |||||||||
| 1.00 | 7 | 92.1 (10.7) | 91.4 (16.5) | 88.8 (11.4) | 92.9 (12.9) | ||||
| 1.01–2.00 | 134 | 68.5 (20.3) | 82.9 (22.0) | 82.9 (18.9) | 78.7 (22.3) | ||||
| 2.01–3.00 | 308 | 58.3 (19.1) | 74.5 (23.1) | 76.2 (20.7) | 70.7 (22.8) | ||||
| 3.01–4.00 | 241 | 44.9 (18.9) | 56.8 (26.3) | 60.7 (24.9) | 55.0 (23.2) | ||||
| 4.01–5.00 | 63 | 25.8 (16.2) | −14.7 (−16.4 to −13.1) | 28.2 (26.4) | −17.8 (−19.9 to −15.8) | 38.3 (26.2) | −14.6 (−16.4 to −12.8) | 39.6 (22.2) | −13.4 (−15.4 to −11.5) |
| p<0.0001 | p<0.0001 | p<0.0001 | p<0.0001 | ||||||
| R2=41.1% | R2=40.7% | R2=40.8% | R2=33.3% | ||||||
| NCS grade | |||||||||
| 1 | 150 | 58.9 (23.9) | 71.0 (27.9) | 72.7 (24.4) | 63.9 (27.4) | ||||
| 2 | 79 | 53.5 (22.9) | 71.5 (27.7) | 74.1 (25.2) | 67.5 (26.2) | ||||
| 3 | 202 | 54.6 (22.8) | 70.5 (27.7) | 72.6 (24.6) | 65.8 (26.0) | ||||
| 4 | 137 | 53.1 (20.5) | 67.0 (26.3) | 68.2 (24.3) | 63.4 (23.9) | ||||
| 5 | 159 | 48.8 (21.2) | 57.8 (30.0) | 63.5 (27.3) | 64.4 (24.4) | ||||
| 6 | 24 | 43.3 (24.9) | −3.16 (−3.56 to −1.22) | 47.9 (29.8) | −3.87 (−5.32 to −2.42) | 52.5 (26.0) | −3.16 (−4.42 to −1.90) | 61.9 (23.6) | −0.86 (−2.18 to 0.47) |
| p<0.0001 | p<0.0001 | p<0.0001 | p=0.197 | ||||||
| R2=15.5% | R2=18.7% | R2=21.9% | R2=15.7% | ||||||
*Parameter estimate (95% CI) from a linear model including gender, age, ethnicity, employment status, smoking status, units of alcohol per week, body mass index, duration of CTS and comorbidity score.
ADL, activities of daily living; CTS, carpal tunnel syndrome; MHQ, Michigan Hand Questionnaire; NCS, nerve conduction studies.