Table 3.

Linear term in trend test among three IGA groups

Variable	1		2		3
	F	P	F	P	F	P
Occlusal plane angle (OPA)	10.936	0.001**	31.097	0.000**	25.069	0.000**
Medial space (MS)	0.934	0.336	8.602	0.005**	1.819	0.181
Lateral space (LS)	0.017	0.897	0.662	0.419	0.083	0.774
Medial inclination of the condyle (MIC)	4.703	0.032*	0.670	0.416	0.106	0.745
Lateral inclination of the condyle (LIC)	0.032	0.859	1.543	0.219	0.127	0.722
Superior space (SS)	3.505	0.064	4.837	0.032*	12.102	0.001**
Anterior space (AS)	1.705	0.195	4.248	0.044*	9.361	0.003**
Posterior space (PS)	2.510	0.116	0.000	0.984	0.020	0.887
Anterior inclination of the condyle (AIC)	12.293	0.001**	11.705	0.001**	20.947	0.000**
Posterior inclination of the condyle (PIC)	0.251	0.617	2.546	0.116	0.108	0.743
Height of the fossa (HF)	1.678	0.198	4.024	0.049*	1.175	0.281
Width of the fossa (WF)	0.104	0.748	0.402	0.529	0.033	0.857
Articular eminence inclination (AEI)	5.020	0.027*	1.585	0.213	3.827	0.053
Long axis of the condyle (LAC)	21.250	0.000**	19.561	0.000**	20.465	0.000**
Minor axis of the condyle (MAC)	20.897	0.000**	0.172	0.679	3.594	0.061

1: IGA < 45°; 2: 45° ≤ IGA ≤ 60°; 3: IGA > 60°

*P < 0.05

**P < 0.01