Table 1.
Baseline characteristics by cohort. Chi Square tests of all categorical variables did not reveal any significant differences between the two groups except for age and treatment expectancy. T-tests were used to analyze the mean age and treatment expectancy scores.
| Baseline Characteristics | Mechanical manip | Manual manip | p-value | |
|---|---|---|---|---|
| n = 53 | n = 39 | |||
| Gender (males) | 56% | 54% | .81 | |
| Age (mean in years) | 38.4 | 49.7 | .001 (t-test) |
|
|
Treatment expectancy (mean score; 1–7 Likert scale) |
5.7 | 6.3 | .003 (t-test) |
|
| Race (Caucasian) | 100% | 100% | - | |
| Marital Status | .21 | |||
| Single | 35% | 18% | ||
| Married | 56% | 68% | ||
| Other | 9% | 14% | ||
| Education | .25 | |||
| ≤ High School | 49% | 36% | ||
| College | 51% | 64% | ||
| Income | .25 | |||
| ≤ $35,000/ yr | 56% | 47% | ||
| $35,001 to $70,000 | 30% | 23% | ||
| > $70,000/ yr | 15% | 30% | ||
| Employment Status | .99 | |||
| Working Full-time | 65% | 63% | ||
| Working Part-time | 13% | 13% | ||
| Other (not working) | 22% | 24% | ||
| Smoker | 30% | 26% | .73 | |
| Medications | .14 | |||
| None | 59% | 78% | ||
| NSAIDs | 32% | 19% | ||
| Prescription pain meds | 9% | 3% | ||