| Methods |
Country: Germany
Setting: paediatric clinic
RCT |
| Participants |
40 mothers attending participating paediatric practice and self‐reporting smoked at least 10 CPD |
| Interventions |
All participants received a quit smoking information sheet and had urinary cotinine levels taken.
Intervention: received results of their cotinine levels within 1 week
Control: did not receive results of cotinine levels until data collection was complete |
| Outcomes |
At 6 weeks:
• Maternal self‐report of tobacco consumption
• Urinary cotinine levels |
| Type of intervention |
Mixed/not stated |
| Notes |
Nicotine consumption did not differ at baseline (median 12 μg for both). |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
High risk |
Randomised by participant numbers (odd or even) |
| Allocation concealment (selection bias) |
Unclear risk |
Not stated |
| Incomplete outcome data (attrition bias)
All outcomes |
Low risk |
Only 2 (of 40) missing at final follow‐up |
| Blinding of outcome assessment (detection bias)
All outcomes |
Low risk |
Biochemical validation used |
