. 2020 Dec 19;6(12):e05723. doi: 10.1016/j.heliyon.2020.e05723

Table 5.

Spline regression analysis.

Dependent Variable	Adjusted R²	F-value	p-value∗	Predictors	B	SE B	p-value
BPI pain score	0.274	7.34	<0.0001	Intercept	2.983	0.319	<0.001∗
				Negative CPM-PPT hand	-0.030	0.011	0.008∗
				Positive CPM-PPT hand	0.009	0.009	0.322
				Von-frey NRS hand	0.192	0.065	0.004∗
				KL grade^∗∗	0.794	0.380	0.039∗
				VAMS anxiety	0.127	0.044	0.004∗
				Von-frey MDT, light touch, knee	0.203	0.077	0.010∗

Abbreviations: BPI: Brief Pain Inventory; PPT: Pain Pressure Threshold; CPM: Conditioned Pain Modulation; NRS: Numeric Rating Scale; KL: Kellgren-Lawrence; VAMS: Visual Analogic Mood Scale; MDT: Mechanical Detection Threshold.

^∗∗

KL grade dichotomized into group 1 = KL I, II and III + group 2 = IV.