| Methods |
Setting: Tertiary care cardiac hospital, Canada
Recruitment: Inpatients with CHD, not explicitly selected by motivation, 90% of eligible enrolled |
| Participants |
100 smokers; 68% M, av. age 54, 48% quit attempt in previous year |
| Interventions |
All participants received in‐hospital brief counselling, access to NRT, S‐H materials
1. Interactive Voice Response (IVR) system contacted participants 3, 14 and 30 days post‐hospital discharge. Participants identified as needing support contacted by nurse counsellor for up to 3 x 20‐min sessions over 8 weeks
2. Usual care |
| Outcomes |
Abstinence at 1 year (PP)
Validation: none |
| Notes |
Mean 2.1 IVR calls completed, 46% received at least 1 counselling call, mean 1.8, so total calls categorised as 4 |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Low risk |
Quote: "mediated through the Clinical Epidemiology Unit’s data centre, using a computer generated randomization list" Block size 6 |
| Allocation concealment (selection bias) |
Low risk |
Quote: "Research staff were unaware of the treatment allocation prior to randomization" |
| Blinding of outcome assessment (detection bias)
All outcomes |
High risk |
Self‐reported outcomes from participants not blinded to treatment condition. Level of personal contact differed between arms |
| Incomplete outcome data (attrition bias)
All outcomes |
Low risk |
˜15% lost to follow‐up, similar between groups. 1 Control death excluded, others included |
