Table 7.
Comparison of pretest and posttest outcome measures
| Variable | Pretesta | Posttesta | Significanceb |
|---|---|---|---|
| NPRS | 4.94 (0.175) | 4.61 (0.188) | 0.020 |
| ODI | 35.15 (1.435) | 33.07 (1.503) | 0.075 |
| SF_36_PF | 35.99 (27.57, 42.30) | 35.99 (31.78, 44.41) | 0.056 |
| SF_36_RP | 37.26 (27.47, 44.61) | 37.26 (27.47, 44.61) | 0.163 |
| SF_36_BP | 33.37 (29.15, 37.18) | 37.18 (29.15, 41.83) | 0.008 |
| SF_36_GH | 45.78 (42.45, 48.17) | 45.78 (38.63, 52.93) | 0.522 |
| SF_36_VT | 42.72 (36.48, 52.09) | 42.72 (33.36, 48.97) | 0.262 |
| SF_36_SF | 40.49 (35.03, 45.94) | 40.49 (29.58, 51.40) | 0.639 |
| SF_36_RE | 44.22 (32.56, 55.88) | 44.22 (32.56, 51.99) | 0.333 |
| SF_36_MH | 47.19 (38.74, 52.82) | 47.19 (38.74, 52.82) | 0.202 |
| SF_36_PCS | 35.09 (0.842) | 37.33 (0.821) | 0.000 |
| SF_36_MCS | 47.79 (40.53, 55.87) | 48.26 (37.40, 55.60) | 0.059 |
Notes:
Mean (SE) reported for normally distributed variables, median (IQR) reported for non-normally distributed variables;
a Bonferonni correction (ie, 0.05/number of comparisons) was applied to alpha to protect against a type 1 error due to multiple comparisons. Thus the new alpha level is: 0.05/12 = .004.
Abbreviations: SE, standard error; IQR, interquartile range; NPRS, Numeric Pain Rating Scale; ODI, Oswestry Disability Index; SF_36_PF, SF36 Physical Function subscale; SF_36_RP, SF_36 Role Physical subscale; SF_36_BP, SF36 Bodily Pain subscale; SF_36_GH, SF36 General Health subscale; SF_36_VT, SF36 Vitality subscale; SF_36_SF, SF36 Social Function subscale; SF_36_RE, SF36 Role Emotional subscale; SF_36_MH, SF36 Mental Health subscale; SF_36_PCS, SF36 Physical Component Summary; SF_36_MCS, AF36 Mental Component Summary.