Table 4. Reliability (Cronbach's α) and correlations (Spearman's rho) of PETS^a domain scales with other measures.

PETS scaleb	Chronic Condition Distress	TSQMc side effects	TSQM convenience	PMCSMd	PROMISe Physical Health	PROMIS Mental Health	H-C services ratingf	# of chronic conditions	# of provider visits
Medical information (7 items, α = 0.91)	0.51 ***	-0.23 ***	-0.51 ***	-0.50 ***	-0.43 ***	-0.49 ***	-0.45 ***	0.05 NS	0.09 NS
Medications (7 items, α = 0.87)	0.47 ***	-0.31 ***	-0.51 ***	-0.38 ***	-0.41 ***	-0.38 ***	-0.24 ***	0.09 NS	0.25 ***
Medical appointments (3 items, α = 0.85)	0.45 ***	-0.27 ***	-0.28 ***	-0.36 ***	-0.45 ***	-0.37 ***	-0.35 ***	0.05 NS	0.11 NS
Monitoring health (2 items, α = 0.81)	0.50 ***	-0.24 ***	-0.41 ***	-0.43 ***	-0.39 ***	-0.37 ***	-0.27 ***	0.05 NS	0.09 NS
Interpersonal Challenges (4 items, α = 0.79)	0.65 ***	-0.28 ***	-0.38 ***	-0.47 ***	-0.53 ***	-0.50 ***	-0.27 ***	0.04 NS	0.12 NS
Medical & healthcare expenses (5 items, α = 0.91)	0.50 ***	-0.28 ***	-0.42 ***	-0.44 ***	-0.48 ***	-0.44 ***	-0.37 ***	0.15 *	0.08 NS
Difficulty with healthcare services (7 items, α = 0.85)	0.40 ***	-0.22 ***	-0.32 ***	-0.39 ***	-0.40 ***	-0.42 ***	-0.58 ***	0.03 NS	0.05 NS
Role / social activity limitations (6 items, α = 0.95)	0.62 ***	-0.33 ***	-0.35 ***	-0.40 ***	-0.55 ***	-0.38 ***	-0.25 ***	0.08 NS	0.15 *
Physical / mental exhaustion (5 items, α = 0.93)	0.64 ***	-0.39 ***	-0.43 ***	-0.50 ***	-0.58 ***	-0.57 ***	-0.30 ***	0.12 NS	0.19 ***

Notes.

^aPETS = Patient Experience with Treatment and Self-Management.

^bHigher PETS scale score = more burden.

^cTSQM: Treatment Satisfaction Questionnaire for Medication.

^dPMCSM: Perceived Medical Condition Self-Management scale.

^ePROMIS: Patient-Reported Outcomes Measurement Information System.

^fHealthcare (H-C) services rating: “How would you rate the convenience of healthcare services that you seek for your health problems?” (0 = not at all TO 10 = extremely).

^***P < .001 (1-tailed);

^*P < .01 (1-tailed); NS = not significant.