Patient-reported outcomes and exercise measures at baseline
| Measure | Item or (sub)scale | No. of patients | Exercise practice, no. (%) of patients | Score | |||||
|---|---|---|---|---|---|---|---|---|---|
| Not allowed | Rarely or never | 1 or 2 times a week | 3 or more times a week | Mean ± SD | Min | Max | |||
| Exercise | Muscle-strength training* | 168 | 25 (15) | 81 (48) | 25 (15) | 37 (22) | |||
| Aerobic exercise* | 168 | 22 (13) | 97 (58) | 24 (14) | 25 (15) | ||||
| Yoga or Pilates* | 168 | 24 (14) | 129 (77) | 8 (5) | 7 (4) | ||||
| Exercise scale (based on first 3 items above) | 164 | 3.65 ± 2.05 | 0 | 9 | |||||
| Patient-reported outcome | Rand-36 physical component score | 164 | 29.95 ± 6.81 | 14 | 46 | ||||
| Rand-36 mental component score | 164 | 40.30 ± 10.59 | 15 | 61 | |||||
| PROMIS Pain Interference score† | 164 | 34.82 ± 7.37 | 22 | 59 | |||||
| Oswestry Disability Index score† | 168 | 55.90 ± 16.01 | 12 | 100 | |||||
| Numeric Rating Scale score† | 168 | 16.18 ± 8.76 | 0 | 38 | |||||
Max = maximum; min = minimum; PROMIS = Patient-Reported Outcome Measurement Information System; Rand-36 = Medical Outcomes Study 36-Item Short-Form Survey; SD = standard deviation.
↵* A nonresponse was counted as the absence of the type of exercise listed.
↵† Rescaled so that higher scores reflect better functioning.
These raw scores are shown here; the statistical models used standardized scores (mean 50, standard deviation 10) to facilitate comparisons.