Table 4.

Estimates obtained from least absolute shrinkage and selection operator (Lasso) regression analyses showing the prediction model of postsurgical pain at three months after surgery. (N = 1,049).

	Intercept	Individual intercept	(CI)	P-value	Slope	(CI)	P value	R2	RMSE
NRS-MEP on day 1,2,3	0.125	0.325	0.285–0.365	<0.001	0.836	0.710–0.961	<0.001	0.142	1.85
NRS-MEP on day 1,2,3,7	0.086	0.413	0.371–0.455	<0.001	1.476	1.304–1.647	<0.001	0.198	1.79
NRS-MEP on day 1,2,3,7, week 6	0.034	0.669	0.631–0.708	<0.001	3.364	3.178–3.551	<0.001	0.460	1.47

Independent variables are pain trajectories over different time points. The dependent variable is movement-evoked pain (NRS-MEP) at three months after surgery.

NRS-MEP movement-evoked numerical rating scale, CI confidence interval, R² means R-squared; RMSE means Root Mean Square Error.