Table 5

RRs and 95% CIs for incidence of histologically confirmed BBD alcohol consumption at ages 15–17 years and 18–22 years assessed in 1989 (follow-up from 1991–1997)

Person-yearsaNonproliferative BBDProliferative BBD
CasesRate/10,000 pybRRc95% CICasesRate/10,000 pybRRc95% CI
Alcohol consumption at ages 15–17 yrs (g/day)
 None292,813393131.0Reference717251.0Reference
 <551,58471141.050.82–1.35113221.000.81–1.22
 5–14.933,57735100.800.57–1.1368200.940.73–1.22
 ≥156,51016251.891.18–3.037110.540.27–1.08
P = 0.51dP = 0.27d
Alcohol consumption at ages 18–22 yrs (g/day)
 None10,128121121.0Reference211211.0Reference
 <5116,975151131.070.84–1.37289251.211.01–1.44
 5–14.9123,272168141.200.95–1.52298251.251.05–1.49
 ≥1544,36973771.461.09–1.96111251.331.05–1.69
P = 0.02dP = 0.007d
  • a Person-years are the same for all case types in the table.

  • b Rate /10,000 py is the crude rate.

  • c RR adjusted for age and BMI.

  • d Test for linear trend of rate ratios across alcohol intake groups.