Table 2.

Correlations between Patient-generated Index (PGI) and other outcome measures.

	Mean (SD)	Range (minimum, maximum)	Correlation with PGI, r (p)†	(95% CI)
PGI	54.3 (27.8)	(0, 100)	—
HAQ	0.8 (0.6)	(0, 2.4)	−0.33 (0.01)	(−0.54, −0.09)
SF-36–Physical functioning	42.7 (29.3)	(0, 100)	0.33 (0.01)	(0.09, 0.55)
SF-36–Role physical	50.2 (29.6)	(0, 100)	0.42 (< 0.01)	(0.20, 0.65)
SF-36–Bodily pain	49.5 (25.4)	(0, 100)	0.39 (< 0.01)	(0.12, 0.64)
SF-36–General health	44.0 (25.4)	(0, 97)	0.35 (< 0.01)	(0.12, 0.56)
SF-36–Vitality	40.0 (22.4)	(0, 100)	0.20 (0.13)	(−0.13, 0.45)
SF-36–Social functioning	61.7 (30.7)	(0, 100)	0.46 (< 0.01)	(0.22, 0.68)
SF-36–Role emotional	74.3 (33.5)	(0, 100)	0.26 (0.04)	(−0.04, 0.52)
SF-36–Mental health	69.4 (21.6)	(0, 100)	0.28 (0.03)	(−0.02, 0.49)
SF-36–PCS	34.1 (11.5)	(13.8, 57.8)	0.39 (< 0.01)	(0.16, 0.60)
SF-36–MCS	47.4 (13.0)	(10.8, 64.7)	0.26 (0.04)	(–0.04, 0.52)
SBI–Appearance	2.6 (3.3)	(0, 10)	−0.36 (< 0.01)	(−0.57, −0.08)
SBI–Bowel	3.8 (3.3)	(0, 10)	−0.37 (< 0.01)	(−0.60, −0.10)
SBI–Calcinosis	1.4 (2.9)	(0, 10)	−0.38 (< 0.01)	(−0.57, −0.15)
SBI–Eating	3.2 (3.3)	(0, 10)	−0.13 (> 0.20)	(−0.42, 0.17)
SBI–Hand	5.0 (3.2)	(0, 10)	−0.33 (0.01)	(−0.56, −0.06)
SBI–Pain	5.1 (3.1)	(0, 10)	−0.50 (< 0.01)	(−0.72, −0.28)
SBI–Shortness of breath	3.6 (3.5)	(0, 10)	−0.11 (> 0.20)	(−0.38, 0.13)
SBI–Skin	4.4 (3.1)	(0, 10)	−0.35 (< 0.01)	(−0.59, −0.09)
SBI–Sleeping	4.0 (3.4)	(0, 10)	−0.35 (< 0.01)	(−0.61, −0.08)
SBI–Burden	6.2 (2.2)	(0, 9)	−0.46 (< 0.01)	(−0.65, −0.22)

^†Pearson correlation coefficients were used to compare PGI scores with patient-reported outcomes. SF-36: Medical Outcomes Study Short Form-36; SBI: Symptom Burden Index; PCS: physical component summary score; MCS: mental component summary score.