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. 2019 Jan 25;20(10):1942–1947. doi: 10.1093/pm/pny295

Figure 2.

Figure 2

Schematic of moderation analysis. Top: In women participants, the association between Pain Catastrophizing Scale (PCS) Total Score and Brief Pain Inventory (BPI) Worst Pain was significant (R2 = 0.081, F(1, 78) = 6.89, P = 0.010), and adding the Subjective Opiate Withdrawal Scale (SOWS) Total Score further explained an increase in variance (ΔR2 = 0.127, ΔF(1, 78) = 12.39, P = 0.001). Bottom: In male participants, the association between PCS Total Score and BPI Worst Pain was significant (R2 = 0.162, F(1, 99) = 19.09, P < 0.001), but the addition of the SOWS Total Score did not explain an increase in variance (ΔR2 < 0.000, ΔF(1, 98) = 0.003, P = 0.954). Standardized beta coefficients are shown for the moderation analysis only. Significant findings are in bold.