Mental health outcomes
Study	Depression	Anxiety	Quality of life	Stress	Negative affect	Other
Bloom 2020	Patient Health Questionnaire‐9 (PHQ‐9): assessed at each follow‐up, data not reported	Not assessed	Not assessed	Not assessed	Positive and Negative Affect Scale (PANAS): assessed at each follow‐up, data not reported	Not assessed
Brown 2013	Not assessed	Not assessed	Not assessed	Not assessed	Profile of Mood States (POMS): assessed at 4 weeks post‐quit. No difference across conditions. Intervention arm scored 46.2 at baseline and 45.7 at 4 weeks post‐baseline (−0.5); comparator arm scored 46.6 at baseline and 45.5 at 4 weeks post‐baseline (−1.1)	Not assessed