Table 1.

Correlations of SIQR, PSD, and pain measures with SF-36 subscales.

SF-36	SIQR	PSD	SIQR Symptom	SSS	SIQR VAS Pain	WPI
Physical	0.68^a	0.40	0.56^a	0.42	0.53^a	0.34
Limitations mental	0.71^a	0.53	0.63^b	0.54	0.51	0.45
Limitations physical	0.59^a	0.42	0.61^b	0.52	0.42^c	0.32
Energy/fatigue	0.66^b	0.57	0.69	0.68	0.42	0.45
Emotional well-being	0.48^a	0.29	0.51^a	0.37	0.38^b	0.21
Social functioning	0.72^a	0.55	0.69	0.64	0.51^c	0.43
General health	0.63^a	0.51	0.63^b	0.55	0.39	0.42
Pain (total = 321)	0.78^a	0.56	0.73^a	0.55	0.74^a	0.48
Pain (No FM = 186)	0.74^a	0.54	0.72^a	0.52	0.75^a	0.46
Pain (FM = 135)	0.76^a	0.33	0.62^a	0.39	0.63^a	0.23

↵a p < 0.001;
↵b p < 0.01;
↵c p < 0.05. The SF-36 scores have been reversed so that all scores indicate greater severity. Steiger’s Z test was used for significance of the difference between dependent correlations: (1) SIQR vs PSD (col. 2 and 3); (2) SIQR Symptom vs SSS (col. 4 and 5); and (3) WPI vs SIQR VAS pain (col. 6 and 7). PSD: Polysymptomatic Distress Scale; SIQR: Symptom Impact Questionnaire; SF-36: Medical Outcomes Study Short Form-36; SSS: Symptom Severity Score; VAS: visual analog scale; WPI: Widespread Pain Index; FM: fibromyalgia.