Table 2.

Differences in knowledge scores from baseline.

Timepoint		Control, median (95% CI)	P valuea	Intervention, median (95% CI)	P valuea
Baseline score		7.22 (6.64 to 7.81)	N/Ab	7.03 (6.46 to 7.60)	N/A
Difference from baseline
	Posttest (1 day)	0.33 (–0.16 to 0.82)	.14	1.00 (0.48 to 1.52)	.001
	1 month	0.48 (–1.13 to 1.19)	.17	1.04 (0.35 to 1.73)	.03
	3 months	0.63 (–0.02 to 1.27)	.06	1.40 (0.68 to 2.12)	.008
	6 months	0.32 (–0.30 to 0.94)	.27	0.88 (0.25 to 1.51)	.144

^aWilcoxon rank sum test for paired data.

^bN/A: not applicable.