Table 3

Preventive maneuvers performed before and after the intervention, as determined by chart audit

	MEAN % OF ELIGIBLE PATIENTS WIT H MANEUVER PERFORMED
PREVENTIVE MANEUVER	PREINTERVENTION	POSTINTERVENTION	CHANGE (95% CONFIDENCE INTERVAL)^*	P VALUE
Grade A
• Screening for colon cancer^†	9.0	36.8	29.6 (19.2 to 40.0)	.0001
• Mammography	74.3	80.1	6.2 (−3.7 to 16.0)	.21
• Clinical breast examination	69.3	69.1	0.8 (−9.5 to 11.1)	.87
• Grade A overall	35.1	52.9	19.3 (10.4 to 28.3)	.0002
Grade B
• Influenza vaccination	75.9	76.5	−0.1 (−8.1 to 7.9)	.98
• Visual acuity testing in elderly	21.6	48.0	28.0 (16.6 to 39.3)	.0001
• Clinical hearing examination	10.8	27.3	15.9 (5.8 to 26.0)	.003
• Papanicolaou smear	61.1	65.4	3.8 (−3.5 to 11.1)	1.000^‡
• Determination of rubella antibody titre	44.3	50.5	6.0 (−7.5 to 19.5)	.37
• Grade B overall	49.2	59.0	9.3 (5.4 to 13.2)	.0001
Grades A and B overall	44.8	56.9	12.3 (8.1 to 16.5)	.0001
Grade D
• Urinalysis—urine dipstick for proteinuria	25.0	9.7	−15.9 (−22.1 to −9.6)	.0001
Composite preventive performance index	51.6	63.3	12.3 (9.0 to 15.6)	.0001

↵* The mean change score might not equal the difference between preintervention and postintervention means owing to withdrawals.
↵† Includes fecal occult blood test (grade A) or sigmoidoscopy (grade B).
↵‡ Sign test performed owing to violation of normality and symmetric distribution assumptions.