“…Among the eight studies on behavioural lifestyle interventions, five were conducted as RCTs (38,41,44,46), two were prospective cohort trials (40,43), and one was a retrospective cohort trial (36). All support group studies used retrospective cohort designs (32)(33)(34)(35)37,39,42,45). Most forms of behavioural management were carried out in group settings; only four were conducted individually (40,41,44,46).…”