Peckham 2015.

Methods	Setting: Mental health services, UK Recruitment: referral from mental health & primary care. Selected for motivation to quit or cut down
Participants	97 smokers with severe mental illness (SMI), 40% F, av. age 47, av. cpd 24 Provider: Mental health professional (MHSCP) trained to deliver smoking cessation behavioral support, (GP for pharmacotherapy)
Interventions	1. Usual NHS quit smoking service with no specific adaptation, could include pharmacotherapy 2. 'Bespoke' smoking cessation intervention tailored to SMI: patients encouraged to reduce smoking, set own quit dates, and make multiple attempts. Pharmacotherapy prescribed by GP, type not stipulated by most often NRT. Time estimated at 91‐300 mins
Outcomes	Abstinence: 7 day PP at 12 months Validation: CO < 10 ppm
Notes	New for 2015. 41/46 participants attended at least one session and the mean number of sessions was 10. Limited information about use of pharmacotherapy, but had to be obtained separately from GP; coded as moderate take up. Two intervention participants did not have CO verification, classified as smoking in this analysis
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer generated centralised randomization
Allocation concealment (selection bias)	Low risk	"The researcher contacted a secure randomisation line run by the York Trials Unit and, once given the details of the patient’s allocation, immediately informed the patient of his or her allocation and set up the first appointment"
Incomplete outcome data (attrition bias) All outcomes	Low risk	Loss to follow‐up 28% (13) I, 31% (16) C