Effects of and satisfaction with short message service reminders for patient medication adherence: a randomized controlled study

Table 2 Comparing the results before and after the SMS intervention

	Variable	Before SMS intervention		After SMS intervention		Improvement	P-value
		N	%	N	%	%
							< .001^a
Intervention group	Delayed doses (Total)	646	84.7^c	137	18.0^c	78.8	< .001^b
	20 ~ 34 y/o	146	90.1	32	19.8	78.1
	35 ~ 49 y/o	181	79.7	52	22.9	71.3
	50 ~ 64 y/o	196	85.6	35	15.2	82.2
	≧ 65 y/o	123	84.8	18	12.4	85.4
Control group	Delayed doses (Total)	349	80.2^c	187	43.0^c	46.4	< .001^b
	20 ~ 34 y/o	83	86.5	58	60.4	30.1
	35 ~ 49 y/o	105	77.8	62	45.9	41.0
	50 ~ 64 y/o	113	77.4	54	37.0	52.2
	≧ 65 y/o	48	82.8	13	22.4	72.9
Intervention group	Missed doses (Total)	352	46.1^c	35	4.6^c	90.1	< .001^b
	20 ~ 34 y/o	90	55.6	9	5.6	90.0
	35 ~ 49 y/o	97	42.7	9	4.0	90.7
	50 ~ 64 y/o	101	44.1	10	4.4	90.0
	≧ 65 y/o	64	44.1	7	4.8	89.1
Control group	Missed doses (Total)	190	43.7^c	74	17.0^c	61.1	< .001^b
	20 ~ 34 y/o	52	54.2	28	29.2	46.2
	35 ~ 49 y/o	62	45.9	14	10.4	77.4
	50 ~ 64 y/o	52	35.6	30	20.6	42.3
	≧ 65 y/o	24	41.4	2	3.5	91.7

a: used chi-square test to examine the difference between groups; b: Used the McNemar’s test to examine the difference between the pre-test and post-test data within the group. c: intervention group% = n/763; control group%=n/435.

ISSN: 1472-6947