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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2012 Dec 29;131(3):271–277. doi: 10.1016/j.drugalcdep.2012.11.019

Figure 1. Bar Charts of Neonatal Outcome Measures at Selected Values of Past 30-Day Average Number of Cigarettes Smoked.

Figure 1

Poisson regression analyses were used to test the relationship between these 5 outcome variables and the past-30 day daily average number of cigarettes smoked, adjusting for medication condition, site, and estimated gestational age at study entry. Estimates are exponentiated parameter estimates. Estimates were calculated at 4 values of the predictor variable of past-30 day daily average number of cigarettes smoked: No cigarette smoking; below-average cigarette smoking, defined as 5.88 cigarettes/day (−1 SD); average cigarette smoking, defined as 13.66 cigarettes/day (Mean); and, above-average cigarette smoking, defined as 21.44 cigarettes/day (+1 SD).