TABLE 5.

Reliability test and corrected item-total correlation of SCADS questionnaire based on the three-component solution obtained.

Component	Item		Corrected item-total correlation	Cronbach’s alpha value (α)
Alpha value of overall questionnaire = 0.707
Component 1	Q4	Verifying frequency of bDMARDs injection taken	0.867	0.875
	Q3	Claiming to inject bDMARDs according to prescribed frequency	0.867
	Q2	Verifying strength of bDMARDs taken	0.628
Component 2	Q6	Verifying the specific day or date of bDMARDs injection taken	0.765	0.753
	Q5	Claiming to inject bDMARDs according to specific day or date	0.765
	Q7	Forgetfulness in injecting bDMARDs	0.405
	Q8	Continue injecting bDMARDs even though feeling better with no joint pain	0.342
Component 3	Q1	Admitting injecting bDMARDs following the prescribed dose	-0.068	0.091
	Q9	The commitment of having bDMARDs injection when traveling away from home	0.076
	Q10	Temporary discontinuation of bDMARDs when having an infection	0.103