Table 3.
Associations between lipstick use and SLE
| Cases (%) |
Controls (%) |
OR (95%CI)a | |
|---|---|---|---|
| Lipstick use (≥3 days/week) | |||
| Never use | 36 (29) | 99 (40) | 1.0 (ref) |
| Ever use | 88 (71) | 149 (60) | 1.71 (1.04–2.82) |
| Frequency, days/weekb | |||
| Never use | 36 (32) | 99 (41) | 1.0 (ref) |
| 3–4 | 23 (20) | 47 (20) | 1.31 (0.67–2.56) |
| 5–6 | 27 (24) | 46 (19) | 1.68 (0.87–3.25) |
| 7 | 28 (25) | 47 (20) | 1.75 (0.89–3.44) |
| p trend=0.07 | |||
| Duration, year | |||
| Never use | 36 (30) | 99 (40) | 1.0 (ref) |
| 0–9 | 21 (17) | 39 (16) | 1.59 (0.81–3.13) |
| 10–19 | 28 (21) | 38 (15) | 2.29 (1.17–4.49) |
| ≥20 | 39 (32) | 72 (29) | 1.55 (0.87–2.75) |
| p trend=0.1 | |||
| Age at initiation, year | |||
| Never use | 36 (29) | 99 (40) | 1.0 (ref) |
| >18 | 24 (19) | 49 (20) | 1.37 (0.70–2.68) |
| 16–18 | 39 (31) | 62 (25) | 1.81 (1.01–3.23) |
| <16 | 25 (20) | 38 (15) | 1.95 (1.01–3.76) |
| p trend=0.02 |
a
Adjusted for smoking, alcohol consumption, permanent hair dye use, and chemical hair straightener use.
b
Ten cases and nine controls had frequency (days/week) missing.