The effect sizes of the changes in knowledge scores (β: 0.651 95% CI 0.532–0.770, p-value <0.001), use perceptions (β: 0.201 95% CI 0.148–0.272, p-value <0.001) and quitting perceptions (β: 0.182 95% CI 0.113–0.250, p-value <0.001) in users were greater and highly significant than those of nonusers ( Table 4 ).
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School-based behavioral intervention to reduce the habit of smokeless tobacco and betel quid use in high-risk youth in Karachi: A randomized controlled trial.
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