TABLE 1.
Baseline Demographic and Pain Sensitivity Information for Clinical and Healthy Participants*
| Variable | Clinical (n = 78) | Healthy (n = 25) | P Value |
|---|---|---|---|
| Age, y† | 39.0 ± 14.5 | 35.2 ± 11.1 | .30 |
| Sex (female) | 46.2 | 52.0 | .61 |
| Ethnicity (Hispanic or Latino) | 5.1 | 12.0 | .36 |
| Race | .11 | ||
| White | 62.3 | 44.0 | |
| Black or African American | 33.8 | 40.0 | |
| Asian | 2.6 | 12.0 | |
| Other | 1.3 | 4.0 | |
| Employment | .25 | ||
| Full time | 25.6 | 40.0 | |
| Part time | 24.4 | 32.0 | |
| Unemployed | 44.9 | 28.0 | |
| Retired | 5.1 | 0.0 | |
| Marital status | .68 | ||
| Single | 52.6 | 48.0 | |
| Married | 21.8 | 36.0 | |
| Living with significant other | 5.1 | 4.0 | |
| Divorced | 19.2 | 12.0 | |
| Widowed | 1.3 | 0.0 | |
| Education | .88 | ||
| Less than high school | 6.4 | 0.0 | |
| Graduated high school | 19.2 | 16.0 | |
| Some college | 28.2 | 36.0 | |
| Graduated college | 15.4 | 20.0 | |
| Some postgraduate college | 12.8 | 12.0 | |
| Completed postgraduate degree | 17.9 | 16.0 | |
| Income | .32 | ||
| Less than $20 000 | 51.9 | 36.0 | |
| $20 000 to $35 000 | 19.5 | 32.0 | |
| $35 000 to $50 000 | 9.1 | 8.0 | |
| $50 000 to $75 000 | 3.9 | 12.0 | |
| More than $75 000 | 15.6 | 12.0 | |
| Pressure pain sensitivity† | |||
| PPT acromion, kg | 3.1 ± 1.6 | 4.7 ± 1.9 | <.05 |
| PPT TA, kg | 5.2 ± 2.4 | 7.1 ± 2.6 | <.05 |
| Heat pain sensitivity† | |||
| HPT, °C | 42.6 ± 1.9 | 43.7 ± 2.3 | <.05 |
| First heat pulse (0–100) | 63.0 ± 26.6 | 59.0 ± 30.6 | .62 |
| Fifth heat pulse (0–100) | 54.6 ± 30.0 | 52.7 ± 27.6 | .74 |
| Temporal summation | −8.4 ± 22.5 | −6.4 ± 17.4 | .96 |
Abbreviations: HPT, heat pain threshold; PPT, pressure pain threshold; TA, tibialis anterior.
*
Values are percent unless otherwise indicated.
†
Values are mean ± SD.