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Table 5 Forward stepwise multiple regression analysis showing zero order (Pearson's r) and partial correlations

From: Distinguishing fibromyalgia from rheumatoid arthritis and systemic lupus in clinical questionnaires: an analysis of the revised Fibromyalgia Impact Questionnaire (FIQR) and its variant, the Symptom Impact Questionnaire (SIQR), along with pain locations

Predictors Pearson's r Partial r Pvalue (partial r)
Mid-lower back -0.540 -0.129 0.0458
Tenderness to touch -0.518 -0.242 0.0002
Neck -0.518 -0.275 0.0000
Arms -0.447 -0.261 0.0000
Hands 0.162 0.237 0.0002
Lateral lower back -0.524 -0.191 0.0030
Sitting for 45 minutes -0.475 -0.177 0.0060
Feeling overwhelmed -0.314 0.274 0.0000
Depression -0.378 -0.190 0.0031
Sensitivity -0.422 -0.144 0.0258
Thighs -0.474 -0.166 0.0101
Feet 0.021 0.176 0.0064
Cleaning floors -0.452 -0.085 0.1914
Anxiety -0.292 0.099 0.1277
Memory -0.428 -0.080 0.2190
  1. Note: Minus correlations indicate that FM patients have higher scores on predictor variable. All Pearson's correlations are significant (N = 253; P < 0.001) except hands (P < 0.01) and feet (P < 0.74).