The effectiveness of the WHO school mental health package in promoting mental health literacy among secondary school teachers in Qatar: a randomized controlled trial.

The intervention group demonstrated a highly significant improvement in their mean scores of MHL at the end of day three of the workshop (mean difference 19.08, 95% CI 17 to 21.16, Cohen’s d = 2.63; p < 0.001) and also in the second post intervention assessment after 3 months (mean difference 16.61, 95% CI 13.96 to 19.26, Cohen’s d = 1.86; p < 001) (Table 3 ).

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