Table 5:
Differences between subjects dichotomized by gender, shoulder width and arm length. Bold values indicate p-values < 0.05
| Parameter╲Dichotomized Variable | Gendera | Shoulder Widtha | Arm Lengtha | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Women | Men | p-valueb | Smaller (nf=13)c | Larger (nf=2)c | p-valueb | Smaller (nf=12)c | Larger (nf=3)c | p-valueb | |
| Mean keyboard Force (% MVC) | 2.8 (1.5) | 2.0 (0.7) | 0.04 | 2.9 (1.5) | 2.0 (0.7) | 0.02 | 2.9 (1.5) | 1.9 (0.6) | 0.02 |
| Median keyboard force (%MVC) | 2.3 (1.5) | 1.5 (0.7) | 0.03 | 2.3 (1.5) | 1.4 (0.7) | 0.02 | 2.3 (1.5) | 1.4 (0.7) | 0.02 |
| 90th percentile keyboard force (% MVC) | 6.1 (2.5) | 4.7 (1.3) | 0.03 | 6.2 (2.4) | 4.6 (1.3) | 0.01 | 6.2 (2.5) | 4.5 (1.0) | 0.01 |
| 50th %tile FCR EMG (% MVC) | 6.6 (1.1) | 3.8 (0.5) | 0.01 | 5.6 (0.6) | 4.8 (1.2) | 0.27 | 6.5 (1.2) | 3.9 (0.4) | 0.02 |
| 50th %tile ECR EMG(% MVC) | 15.0 (3.8) | 8.1 (1.0) | 0.05 | 14.9 (4.0) | 8.2 (1.0) | 0.05 | 14.9 (4.0) | 8.2 (0.9) | 0.05 |
| 50th %tile Trapezius EMG (% MVC) | 7.0 (1.1) | 5.0 (1.0) | 0.10 | 7.7 (1.3) | 4.4 (0.5) | 0.01 | 6.3 (1.2) | 5.8 (1.0) | 0.38 |
| Range of Motion of Wrist Extension (deg) | 16.3 (1.1) | 13.3 (1.1) | 0.04 | 15.9 (1.2) | 13.8 (1.2) | 0.13 | 16.7 (1.1) | 13.0 (1.1) | 0.03 |
| Range of Motion of Wrist R/U (deg) | 10.9 (0.8) | 10.0 (0.8) | 0.24 | 11.0 (0.8) | 9.9 (0.8) | 0.15 | 12.1 (0.7) | 8.8 (0.7) | 0.00 |
| Shoulder Flexion/Extension ROM (deg) | 9.9 (0.7) | 7.8 (0.8) | 0.02 | 10.0 (0.8) | 7.6 (0.6) | 0.00 | 10.3 (0.7) | 7.4 (0.7) | 0.00 |
| Shoulder Abduction 90th%tile (deg) | 9.6 (1.4) | 8.1 (1.3) | 0.21 | 9.4 (1.5) | 8.4 (1.4) | 0.3 | 10.4 (1.6) | 7.3 (1.0) | 0.05 |
| Median Shoulder External Rotation (deg) | 35.0 (6.5) | 14.2 (4.8) | 0.01 | 35.4 (6.4) | 13.8 (4.8) | 0.00 | 39.0 (6.5) | 10.1 (2.5) | 0.00 |
a
There were no significant differences between groups in terms of age and typing speed
b
p-values are from single sided student t-test testing if the values for women or smaller anthropometry were larger than values for men or larger anthropometry
c
nf = number of females in the group of 15 total.