. Author manuscript; available in PMC: 2017 Dec 1.

Published in final edited form as: Value Health. 2016 Aug 31;19(8):996–1001. doi: 10.1016/j.jval.2016.07.001

Table 5.

Polychoric factor analysis of MGLS and other items indicating the extent of adherence (n=6,261)

Questionnaire item	Factor1	Factor2	Factor3	Uniqueness
Ever forget to take medicines	0.91^*	−0.10	−0.02	0.30
Ever careless about taking medicines	0.40^*	0.38	−0.02	0.52
Stop taking medicines when feeling better	−0.05	0.75^*	0.05	0.45
Stop taking medicines if you feel worse	−0.05	0.67^*	0.01	0.58
Frequency of stretching medicines in past 4 weeks	0.06	0.08	0.62^*	0.51
Frequency of running out of medicines in past 4 weeks	0.07	−0.01	0.64^*	0.54
Frequency of missed taking of medicines in past 4 weeks	0.84^*	0.01	0.10	0.18
Percent of the time medication was taken in past 4 weeks	−0.40^*	−0.16	0.03	0.75

MGLS: Morisky Green Levine Medication Adherence Scale.

Factor loading greater than 0.4.