Assessing the adherence behavior of glaucoma patients to topical eye drops

Figures & data

Figure 1 Stages of visual field defects according to Mills’ classification in the study group.

Figure 2 Stages of optic disk changes according to Jonas’ classification in the study group.

Figure 3 Reasons for missing doses of eye drops.

Table 1 Descriptive values of the adherence measures at T1 and T2

Adherence measures	Possible values	N	T1		T2
			Mean	SD	Mean	SD
ARMS2	0–99	120	3.38	(6.89)	2.80	(4.05)
VAS-AD	0.0–10.0	116	9.03	(1.34)	9.08	(1.03)
Missed doses	Starting from 0	113	0.37	(0.81)	0.50	(1.08)

Abbreviations: ARMS2, Adherence to Refills and Medication Scale, German-translated version; SD, standard deviation; T1, first point of measurement; T2, second point of measurement; VAS-AD, visual analog scale for adherence.

Table 2 Correlations of the adherence measures at T1 and T2

Measures, (n)	T1			T2
	(1)	(2)	(3)	(1)	(2)	(3)
ARMS2, (1)	1	NA	NA	1	NA	NA
VAS-AD (P-value), (2)	−0.41 (0.007)	1	NA	−0.31 (0.006)	1	NA
Missed doses (P-value), (3)	0.43 (0.006)	−0.47 (0.007)	1	0.53 (0.008)	−0.28 (0.008)	1

Abbreviations: ARMS2, Adherence to Refills and Medication Scale, German-translated version; NA, not applicable; T1, first point of measurement; T2, second point of measurement; VAS-AD, visual analog scale for adherence.

Table 3 Correlations between demographic/clinical factors and adherence

	T1		T2
	ARMS2	VAS-AD	ARMS2	VAS-AD
Demographic factors
Age	−0.13	0.09	−0.14	0.04
Sex	−0.01	−0.06	0.01	0.05
Education	−0.08	0.08	−0.07	0.03
Clinical factors
IOP	0.01	−0.01	−0.09	0.15
Maximal IOP	−0.09	0.07	−0.13	−0.13
Visual acuity	−0.03	−0.03	0.05	−0.02
Stage of visual field defects	0.04	0.09	−0.09	0.04
Stage of optic disk changes	−0.01	0.04	−0.09	−0.01
Blindness	0.12	−0.27**	0.01	−0.05

Notes:

** P<0.01.

Abbreviations: ARMS2, Adherence to Refills and Medication Scale, German-translated version; IOP, intraocular pressure; T1, first point of measurement; T2, second point of measurement; VAS-AD, visual analog scale for adherence.