Lee 1980.

Methods	Method: Retrospective review of the medical records of patients meeting the histopathology criteria for inclusion in an RCT. Setting: Radiology institute in St. Louis, Missouri. 1974 ‐ 8. RCT: Trial of radiotherapy for lung cancer.
Data	Recruitment data: Clinicians' decision to invite or not invite individual patients to participate in the trial. (Dis)incentive data: Demographic factors.
Comparisons	Comparison of demographic and prognostic factors of patients invited to participate in the trial with those who were eligible for the trial but not invited.
Outcomes	The decision of the clinician to invite or not invite individual patients to participate in the trial.
Notes	Twelve radiotherapists were included in the study on recruitment . 77 patients met the criteria for entry into the trial of whom 44/77 (57%) were invited by their clinician to participate and 41/77 (53%) were recruited.