Table 1. Baseline Demographic Characteristics of Patients With Undifferentiated Pruritus and Control Patients After Propensity Score Matching.
| Characteristic | No. (%) | P value | |
|---|---|---|---|
| Pruritus (n = 327 502) | Control (n = 327 502) | ||
| Age at index, mean (SD), y | 42.2 (22.1) | 42.2 (22.1) | .98 |
| Sex | |||
| Female | 223 109 (68.1) | 223 109 (68.1) | .96 |
| Male | 104 327 (31.9) | 104 327 (31.9) | .98 |
| Race and ethnicitya | |||
| American Indian or Alaska Native | 1243 (0.4) | 1236 (0.4) | .89 |
| Asian | 11 310 (3.5) | 11 283 (3.5) | .86 |
| Black | 72 674 (22.2) | 72 706 (22.2) | .92 |
| Native Hawaiian or Pacific Islander | 470 (0.1) | 453 (0.1) | .58 |
| White | 194 011 (59.2) | 194 032 (59.3) | .96 |
| Risk factors | |||
| Smoking | 28 091 (8.6) | 28 094 (8.6) | .99 |
| Alcohol use disorder | 6915 (2.1) | 6900 (2.1) | .90 |
| BMI, mean (SD) | 28.4 (7.7) | 27.9 (7.7) | .98 |
Abbreviation: BMI, body mass index, calculated as weight in kilograms divided by height in meters squared.
a
The remainder 14.6% signifies unknown category. The TriNetX database does not distinguish between unknown races and ethnicities and missing information.