Table 4.
Age-adjusted and multivariate relative risks for confirmed* incident psoriasis by amount of alcohol intake and amount of beer intake
| Alcohol intake (drinks/wk) |
N | RR (95% CI) Age-adjusted | RR (95% CI) Multivariate † |
|---|---|---|---|
| None (referent) | 213 | 1.00 | 1.00 |
| 0.1 – 0.3 | 198 | 1.03 (0.85 – 1.25) | 1.08 (0.89 – 1.31) |
| 0.4 – 0.7 | 57 | 1.02 (0.76 – 1.36) | 1.12 (0.83 – 1.50) |
| 0.8 – 1.1 | 41 | 1.26 (0.90 – 1.77) | 0.40 (0.99 – 1.97) |
| 1.2 – 2.3 | 22 | 1.24 (0.80 – 1.93) | 1.34 (0.85 – 2.08) |
| ≥ 2.3 | 19 | 2.68 (1.67 – 4.29) | 2.54 (1.57 – 4.10) |
| Total cases‡ | 550 | ||
| P for trend | 0.0005 | 0.0002 | |
| Beer (# drinks) | |||
| None (referent) | 418 | 1.00 | 1.00 |
| 1 – 3/mo | 68 | 1.20 (0.92 – 1.55) | 1.20 (0.93 – 1.56) |
| 1/wk | 18 | 0.76 (0.47 – 1.22) | 0.81 (0.50 – 1.29) |
| 2 – 4/wk | 12 | 0.85 (0.48 – 1.50) | 0.88 (0.49 – 1.57) |
| ≥ 5/wk | 15 | 2.40 (1.40 – 3.96) | 2.29 (1.36 – 3.85) |
| Total cases‡ | 531 | ||
| P for trend | <0.0001 | 0.001 | |
Abbreviations: RR, relative risk; CI, confidence interval, BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); DFE, dietary folate equivalents; METS, metabolic equivalents
*
Confirmed using the psoriasis screening tool 32
†
Simultaneously adjusted for age, smoking (never, current, past), BMI (21–22.9, 23–24.9, 25–27.4, 27.5–29.9, 30–34.9, ≥35 kg/m2), and physical activity in quintiles of METS per week
‡
Number of cases may not total 577 due to missing data