Table 1.
Subject demographics and baseline characteristics of the P.P. population
| Variable | Total | CPP group | HQ group |
|---|---|---|---|
| Age, years | |||
| Mean (SEM) | 51 (±1) | 52 (±2) | 50 (±2) |
| Range | 35; 60 | 37; 59 | 35; 60 |
| Sex, n (%) | |||
| Male | 0 | 0 | 0 |
| Female | 39 (100) | 20 (100) | 19 (100) |
| Ethnicity, n (%) | |||
| Caucasian | 0 | 0 | 0 |
| African | 8 (20) | 5 (25) | 3 (16) |
| Metis | 11 (28) | 4 (20) | 7 (37) |
| Indian | 20 (52) | 11 (55) | 9 (47) |
| Asian | 0 | 0 | 0 |
| Phototype, n (%) | |||
| IV | 24 (62) | 12 (60) | 12 (63) |
| V | 15 (38) | 8 (40) | 7 (37) |
| Skin type, n (%) | |||
| Normal | 8 (20) | 4 (20) | 4 (21) |
| Combination | 14 (36) | 10 (50) | 4 (21) |
| Dry | 3 (8) | 3 (15) | 0 |
| Greasy | 14 (36) | 3 (15) | 11 (58) |
n, number, SEM, standard error of the mean.