Table 6.
Skin Reaction | No. of Cases | No. of Person-Years | Age Adjusted | Multivariable Adjustedb | ||
---|---|---|---|---|---|---|
RR | 95% CI | RR | 95% CI | |||
Practically none | 3,521 | 235,078 | 1.00 | Referent | 1.00 | Referent |
Redness only | 8,143 | 524,247 | 1.02 | 0.98, 1.06 | 1.02 | 0.98, 1.06 |
Burn | 4,109 | 262,828 | 1.02 | 0.97, 1.07 | 1.02 | 0.97, 1.07 |
Painful burn | 1,794 | 110,798 | 1.12 | 1.06, 1.18 | 1.07 | 1.01, 1.14 |
Painful burn with blisters | 838 | 53,618 | 1.02 | 0.94, 1.10 | 1.01 | 0.93, 1.08 |
P for trend | 0.15 |
Abbreviations: CI, confidence interval; RR, relative risk.
a A total of 56 cases of hearing loss were excluded from analysis because of missing or incomplete data.
b Adjusted for age, body mass index, waist circumference, alcohol consumption, physical activity level, nutrient intake, smoking status, history of hypertension, history of diabetes, history of tinnitus, and analgesic (acetaminophen, aspirin, and ibuprofen) use.