corrections

for that week, and stratified the sample into thirds according to the level of nicotine dependence, as assessed with the use of the Fagerström Test for Nicotine Dependence.4 We also asked about income for the previous month and about difficulty finding shelter, food, clothing, somewhere to wash, and somewhere to use the bathroom during that month.5 We assessed for trends in tobacco expenditures, income, and subsistence difficulties according to extent of nicotine dependence. We Winsorized expenditures and income at the 99th percentile to limit the influence of extreme outliers. Three quarters of participants were men, and the mean age was 48 years; 36% were white, 41% were black, and 18% were Hispanic. Participants reported spending a mean of $44 (95% confidence interval [CI], $40 to $47) on tobacco in the previous week and having a mean income of $513 (95% CI, $462 to $564) in the previous month (Table 1). A considerable proportion reported difficulty finding shelter (49%), food (41%), clothing (50%), somewhere to wash (35%), and somewhere to use the bathroom (43%) in the previous month. Nicotine dependence was significantly associated with tobacco expenditures during the previous week (P