Medication adherence support of an in-home electronic medication dispensing system for individuals living with chronic conditions: a pilot randomized controlled trial

Table 4 Wilcoxon Matched-Pairs Signed Rank Test comparing pretest and posttest self-reported scores

Question	n	Baseline – M₁ Median (IQR)	6-month - M₂ Median (IQR)	Z	p-value
In the last 30 days, did you find it challenging to take your medication(s) on time?^a
Intervention	16	3.00 (2)	1.00 (2)	−2.28	0.02^d
Control	15	3.00 (1)	2.00 (2)	−2.78	< 0.01^d
In the last 30 days, did you take your medication(s) at a different time than prescribed?^a
Intervention	16	3.00 (2)	2.00 (2)	−1.35	0.18
Control	15	3.00 (3)	1.00 (1)	−2.43	< 0.01^d
In the last 30 days, did you miss taking any medication(s)?^a
Intervention	16	2.00 (2)	1.00 (1)	−2.70	< 0.01^d
Control	15	3.00 (1)	2.00 (1)	−2.23	0.03^d
In the last 30 days, please rate your medication adherence (taking your medication on time) on a scale of 1 to 10.^b
Intervention	16	8.00 (2)^e	9 (2)	−2.65	< 0.01^d
Control	15	7.00 (4)^e	9.00 (3)	−1.79	0.07
In general, how would you say your health is in the last 30 days?^c
Intervention	16	2.50 (1)	3.00 (1)	−2.13	0.03^d
Control	15	2.00 (0)	2.00 (2)	−0.83	0.41

IQR Interquartile Range
^aLikert scale was used to obtain occurrence scores (1 = Never; 2 = Rarely; 3 = Sometimes; 4 = Often; 5 = Always)
^bLikert scale was used to obtain adherence scores (1 = Least Adherent; 10 = Most Adherent)
^cLikert scale was used to obtain health status quality scores (1 = Poor; 2 = Fair; 3 = Good; 4 = Very Good; 5 = Excellent)
^dSignificant differences at 95% confidence level
^eThe reported values at baseline are different than Table 2, Table 5 and Fig. 5 because the Wilcoxon Matched-Pairs Signed Rank Test only included recoded values at pre-post measurement and missing values are excluded

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