Spss for windows version 19

Statistical analyses were conducted using SPSS for Windows, Version 19.
Descriptive analyses included means and standard deviations for continuous
variables and frequencies for categorical variables. We compared current
smokers, past smokers, and never smokers on demographic, clinical, and cell
phone use characteristics. Women were identified as current smokers if they
endorsed current daily smoking, regular smoking despite having cut down, or
smoking once in a while. Current smokers were asked the average number of
cigarettes that they smoked daily. Due to the low frequency of Caucasian, Asian,
and Latina racial/ethnic groups, we dichotomized race/ethnicity as African
American vs. Non-African American. We used PHQ-9 scores to differentiate Major
Depression, “other depression,”and “no
depression” based on the methods described by Kroenke et al. (20 (link)).
We used a chi-square test to examine discrete variables and analysis of
variance to test group differences on continuous variables, with
Tukey’sHSD testa posteriori. Statistical significance
was set at alpha=0.05.Although we considered using regression analysis to
control the type I error rate, because this was a hypothesis-generating study,
we chose to limit the analyses to univariate tests for ease of
interpretation.