Baseline patient characteristics. Data are expressed as means and ±SDs or absolute numbers and relative frequencies (in parentheses)
| Chiropractic care n=59 | Self-management n=56 | |
|---|---|---|
| Age, years±SD | 51.4±10.0 | 50.8±12.1 |
| Female, n (%) | 26 (44.0) | 22 (39.3) |
| Maximum chest pain (0–10),* ±SD | 6.7±2.4 | 5.9±2.3 |
| EQ-5D, mean±SD | 0.738±0.021 | 0.718±0.022 |
| SF-6D, mean±SD | 0.695±0.015 | 0.676±0.016 |
| Married/living with someone, n (%) | 51 (86.4) | 50 (90.9) |
| Working, n (%) | 44 (75.9) | 35 (63.6) |
| College graduate, n (%) | 16 (27.6) | 16 (30.2) |
| Expectation of treatment† | ||
| Chiropractic care±SD | 2.2±0.5 | 2.1±0.6 |
| Self-management±SD | 2.3±0.5 | 2.3±0.6 |
*Pain intensity was reported on an 11-point numeric rating scale ranging from 0=no pain to 10=worst possible pain.
†Expectation was reported as average ratings on a five-point box scale (much better=1 to much worse=5).
EQ-5D, EuroQol five-dimension questionnaire; SF-6D, six-dimensional health status short form.