Table 3.
Test of Homogeneity of Variances
| Variables | Levene Statistic | Significance |
|---|---|---|
| NPRS | 0.732 | .402 |
| sEMG R1 | 0.152 | .7 |
| sEMG L1 | 0.512 | .482 |
| sEMG R2 | 0.2 | .659 |
| sEMG L2 | 0.12 | .732 |
| ODI | 0.054 | .819 |
| GPSQI | 2.9 | .104 |
| FABQ-PA | 0.004 | .948 |
| FABQ-W | 0.018 | .896 |
| CE (cm) | 3.491 | .076 |
CE, chest expansion (in cm); FABQ-PA, Fear-Avoidance Belief Questionnaire physical activity; FABQ-W, Fear-Avoidance Belief Questionnaire work score; GPSQI, Global Pittsburgh Sleep Quality Index score; NPRS, numerical pain rating scale; ODI, Oswestry Disability Index score; sEMG R1, L1, R2, and L2, surface electromyography for right and left transverse abdominus during tuck in (1) and curl up against maximal resistance (2), respectively.