Bricker 2014.

Methods	Setting: South Carolina, USA Recruitment: Staff advertised the study to the quitline callers
Participants	121 uninsured callers to the South Carolina State Quitline who wanted to quit in the following 30 days
Interventions	1. Telephone counselling (CBT) + NRT 2. Telephone counselling (ACT) + NRT 5 weekly calls, 30‐min first session and 15‐min subsequently, were offered. All participants received standard 2‐week NRT (patch or gum) of choice
Outcomes	Self‐reported abstinence at 6 m (30‐day PP) Validation: none
Notes	New for 2018 update Funding: "This study was supported by the National Institutes of Health (T32MH082709 to RV, K23DA026517 to JLH, R21DA030646 to JB) and the Fred Hutchinson Cancer Research Center." Declarations of interest: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "Randomized study arm assignments were computer generated"
Allocation concealment (selection bias)	Low risk	Quote: "Randomized study arm assignments were [...] concealed"
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Abstinence not biochemically validated, but same level of personal contact in different study arms
Incomplete outcome data (attrition bias) All outcomes	Low risk	Proportion of individuals lost to follow‐up was greater in CBT than in ACT arm (39% and 27%, respectively) but less than 50% overall