Printed educational messages aimed at family practitioners fail to increase retinal screening among their patients with diabetes: a pragmatic cluster randomized controlled trial [ISRCTN72772651]

Table 4 Results

Percentage of patients obtaining retinal screening within 90 days of mail out (Crude success rate)*
Intervention	Median success rate (percent)	25th and 75th percentile success rates (percent)	P-value
Informed only (reference group)	31.0	25.0, 37.0	0.96
+ insert	30.9	25.3, 37.8
+ outsert, no reminder notepad	30.8	25.0, 37.1
+ outsert and reminder notepad	30.4	25.0, 37.5
+ insert and outsert, no reminder notepad	30.3	25.0, 37.3
+ insert and outsert and reminder notepad	30.4	25.0, 37.5
Overall	30.8	25.0, 37.5
Regression Model: Unadjusted
Intervention	Odds ratio	95% confidence interval	P-value
Informed only (reference group)	1.00		0.97
+ insert	1.00	0.96 to 1.03
+ outsert, no reminder notepad	0.99	0.95 to 1.05
+ outsert and reminder notepad	0.98	0.93 to 1.03
+ insert and outsert, no reminder notepad	0.99	0.94 to 1.04
+ insert and outsert and reminder notepad	0.99	0.94 to 1.04
Regression Model: Adjusted for patient and physician covariates ^†
Intervention	Odds ratio	95% confidence interval	P-value
Informed only (reference group)	1.00		0.66
+ insert	0.99	0.95 to 1.03
+ outsert, no reminder notepad	0.96	0.91 to 1.01
+ outsert and reminder notepad	0.96	0.91 to 1.02
+ insert and outsert, no reminder notepad	0.98	0.93 to 1.04
+ insert and outsert and reminder notepad	0.97	0.92 to 1.02

*In order to present the quartiles, the percentage of patients receiving an eye examination was determined for each physician, and these percentages were summarized for each intervention group. Group practices were not taken into account for this crude analysis.
^†The model was adjusted for these patient variables: age, gender, length of time diagnosed with diabetes, and whether the patient had an eye examination at any time in the two years prior to the office visit. The model was adjusted for these physician variables: year of graduation, gender, place of training, type of practice (solo/group), place of practice (rural/urban), and elapsed time between the mail-out and the office visit.

ISSN: 1748-5908