GETCB 05CB88.

Methods	1988 to 1994 RCT
Participants	539 patients Stages I, II, III Trial data used in subgroup analyses for sex, age, stage and nodal status
Interventions	Surgery + radiotherapy vs surgery alone RT details 60 Gy in 24 to 30 fractions in 6 weeks Prescription technique: isocentre Machine used: Co60 and linac (majority linac) Average field size (cm): unavailable Clinical target volume: bronchial stump, hilum, mediastinum Technique: spinal cord blocks, oblique fields, lateral fields
Outcomes	Survival
Notes	Same publication as GETCB 04CB86
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "randomly assigned by centralised telephone procedure" Comment: stated as randomised in paper; checks run on IPD suggest adequate sequence generation
Allocation concealment (selection bias)	Low risk	Comment: randomisation by central telephone call
Blinding (performance bias and detection bias) All outcomes	Low risk	Comment: trial not blinded owing to the nature of the intervention; outcome not likely influenced by lack of blinding
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comment: individual participant data obtained and checked for all outcomes
Selective reporting (reporting bias)	Low risk	Comment: individual participant data obtained and checked for all outcomes
Other bias	Low risk	Comment: study apparently free of other sources of bias