Validation of a simple tool to assess risk of waterpipe tobacco smoking among sixth and seventh graders in Lebanon.

Overview

BACKGROUND: Waterpipe tobacco smoking (WTS) is highly prevalent in the Eastern Mediterranean region. While studies have identified socio-demographic factors differentiating smokers from non-smokers, validated tools predicting WTS are lacking. METHODS: Over 1000 (n = 1164) sixth and seventh grade students in Lebanon were randomly assigned to a prediction model group and validation model group. In the prediction model group, backward stepwise logistic regression enabled the identification of socio-demographic and psychosocial factors associated with ever and current WTS. This formed risk scores which were tested on the validation model group. RESULTS: The risk score for current WTS was out of four and included reduced religiosity, cigarette use and the perception that WTS was associated with a good time. The risk score for ever WTS was out of seven and included an additional two variables: increased age and the belief that WTS did not cause oral cancer. In the validation model group, the model displayed moderate discrimination [area under the curve: 0.77 (current), 0.68 (ever)], excellent goodness-of-fit (P > 0.05 for both) and optimal sensitivity and specificity of 80.1 and 58.4% (current), and 39.5 and 94.4%, (ever), respectively. CONCLUSIONS: WTS use can be predicted using simple validated tools. These can direct health promotion and legislative interventions.