Table 2.

Proportions (percentages) of subjects who had a cholesterol test within three months of intervention according to risk of coronary heart disease

	Toronto Working Group’s risk criteria for screening
	Met	Not met
Risk appraisal questionnaire
Intervention group	45/421 (10.7)*	30/1128 (2.7)†
Control group	9/504 (1.8)	18/1099 (1.6)
Total	54/925 (5.8)	48/2227 (2.2)
Difference in percentages (95% CI)	8.9 (5.7 to 12.1)	0.18 (−1.3 to 2.8)

^*P<0.001,  

^†P=0.1745 for intervention v control group after adjustment for the correlation for cholesterol testing within households.