Table 1.

Principal component analysis of the Hill-bone high blood pressure compliance scale (n = 452).

Item How often	Score (Mean ± SD)	Principal component analysis
		Salt intake	Appointment keeping	Medication taking
1. Do you forget to take your HBP medicine?	1.75 ± 0.70	0.634	0.290	−0.143
2. Do you decide not to take your HBP medicine?	1.22 ± 0.49	0.581	0.430	−0.110
3. Do you eat salty food?	1.25 ± 0.50	0.490	−0.246	0.176
4. Do you shake salt, fondor, or aromat on your food before you eat it?	1.47 ± 0.60	0.341	−0.513	0.488
5. Do you eat fast food?	1.59 ± 0.69	0.421	−0.419	0.327
6. Do you get the next appointment before you leave the clinic?	1.54 ± 0.87	0.337	0.223	−0.298
7. Do you miss scheduled appointments?	1.28 ± 0.49	0.147	0.355
8. Do you leave the dispensary without obtaining your prescribed pills?	1.35 ± 0.66	0.222	−0.154	−0.175
9. Do you run out of HBP pills?	1.41 ± 0.60	0.364	−0.245	−0.119
10. Do you skip your HBP medicines 1–3 days before you go to the clinic?	1.28 ± 0.49	0.122
11. Do you miss taking your HBP pills when you feel better?	1.52 ± 0.65	0.443	−0.104	−0.170
12. Do you miss taking your HBP pills when you feel sick?	1.23 ± 0.45	0.246	0.497	0.465
13. Do you take someone else's HBP pill?	1.2 ± 0.42	0.255	0.407	0.435
14. Do you miss taking your HBP pills when you care less?	1.66 ± 0.71	0.454	−0.301	−0.424

HBP: High blood pressure.