Table 4 PTS (°) characteristics by age groups
|  | Group A (25–29) | Group B (30–39) | Group C (40–49) | Group D (50–59) | F value | P value | ||||
|---|---|---|---|---|---|---|---|---|---|---|
Mean (N) | SD | Mean (N) | SD | Mean (N) | SD | Mean (N) | SD | |||
Left side | 8.64 (163) | 3.73 | 6.92 (155) | 3.42 | 7.42 (165) | 3.75 | 7.53 (154) | 3.98 | 6.09 | <  0.001 |
Right side | 8.68 (145) | 3.84 | 7.48 (155) | 4.21 | 7.13 (165) | 3.64 | 7.66 (155) | 3.80 | 4.45 | 0.004 |