Table 6.
Select characteristics of 4 weeks responders versus nonresponders
| Variable | Responders | Nonresponders | Significanceb |
|---|---|---|---|
| Age (mean, SE) | 52.02 (1.286) | 46.57 (6.148) | 0.593 |
| LBP duration (median IQR) | 108.00 (479) | 36.00 (114) | 0.620 |
| Female | 55/108 (50.9) | 1/7 (14.3) | 0.114 |
| Income (CAD) | |||
| < 30K | 19/103 (18.4) | 1/7 (16.7) | 0.344 |
| 30–59,999K | 34/103 (33.0) | 4/7 (66.7) | |
| 60–99,999K | 30/103 (29.1) | 1/7 (16.7) | |
| > 100K | 20/103 (19.4) | 0/7 (0) | |
| Education | |||
| < Grade 12 | 19/108 (17.6) | 2/7 (28.6) | 0.837 |
| Grade 12 | 28/108 (25.9) | 2/7 (28.6) | |
| Trade school | 32/108 (29.6) | 2/7 (28.6) | |
| University | 29/108 (26.9) | 1/7 (14.3) | |
| Rural residencea | 75/108 (69.4) | 2/7 (28.6) | 0.039 |
| Internet follow-up | 46/108 (42.9) | 3/7 (42.9) | 1.00 |
| Diagnostic triage | |||
| Not spine | 5/108 (4.6) | 0/7 (0) | 0.244 |
| Serious spine | 7/108 (6.5) | 1/7 (14.3) | |
| Nerve root | 53/108 (49.1) | 1/7 (14.3) | |
| Nonspecific back | 43/108 (39.8) | 5/7 (71.4) |
Notes:
a
Rural residence = weak or no MIZ;
b
comparisons between responders and nonresponders done with independent samples t-test (age), Mann-Whitney U test (LBP duration), Chi Square or Fisher’s exact tests.
Abbreviations: SE, standard error; LBP, low back pain; IQR, interquartile range; MIZ, Metropolitan Influenced Zones.