The alcohol and nicotine dependent subsamples evidenced high rates of childhood maltreatment (Table 1; for rates among non-dependent participants see Supplemental Table 3). Among participants with alcohol dependence at Wave 1, 58.17% reported no maltreatment. The percent reporting one, two, three, four and all five types of childhood maltreatment was 19.27%, 9.90%, 6.51%, 4.36%, and 1.80%, respectively (mean = 0.85 types [95% CI: 0.76–0.94]). Among those with nicotine dependence at Wave 1, 54.97% reported no maltreatment. The percent reporting one, two, three, four and five types of childhood maltreatment was 20.06%, 9.72%, 7.15%, 5.70%, and 2.40%, respectively (mean = 0.96 types [95% CI: 0.90–1.01]). Among those with Wave 1 alcohol dependence, 30.1% had persistent dependence, and among those with Wave 1 nicotine dependence, 56.6% had persistent dependence (22).
