Imputation of a true endpoint from a surrogate: application to a cluster randomized controlled trial with partial information on the true endpoint

Table 2 General practice characteristics

	All audited patients				All patients with reported data
Practice characteristic	Intervention		Control		Intervention		Control
Mean list size	6974		5167		6965		5314
Fund-holding	7/27	26%	4/25	16%	11/40	28%	6/36	17%
Has branch surgeries	15/27	56%	16/25	64%	17/40	43%	24/36	67%
Rural	10/27	37%	7/25	28%	16/36	44%	9/36	25%
Has drug dispensing facilities¹	0.34		0.42		0.32		0.44
Male partners¹	0.63		0.77		0.67		0.76
Has trainees	15/27	56%	9/25	36%	15/40	38%	9/36	25%
Partners on obstetric list¹	0.92		1.00		0.89		0.99

ISSN: 1471-2288