Predicting Acute Postoperative Pain Trajectories and Long-Term Outcomes of Adolescents after Spinal Fusion Surgery

Table 2

Goodness of fit indices for the twelve tested trajectory models.

Number of trajectories	Linear			Linear + quadratic
	AIC	BIC	SC (%)	AIC	BIC	SC (%)
1	8170.13	8178.12	100	8159.95	8170.6	100
2	7346.11	7362.09	43.4	7328.15	7349.46	43.4
3	7057.98	7081.95	26.4	7035.83	7067.79	26.4
4	6982.58	7014.54	23.6	6959.67	7002.28	23.6
5	6933.27	6973.22	11.3	6915.3	6968.57	11.3
6	6908.45	6956.39	7.5	6879.58	6943.5	9.4

The model with the best fit. AIC: Akaike Information Criterion. BIC: Bayesian Information Criterion. SC: smallest class size.