Table 2. Comparison of measurement models.

Model	Factors	χ2	df	Δχ2	RMSEA	CFI	TLI	SRMR
Baseline model	Five factors	3020.006	965		0.050	0.920	0.914	0.064
Model 1	Four factors	5405.203	969	2385.197**	0.073	0.827	0.815	0.112
Model 2	Three factors	6756.895	972	3736.889**	0.083	0.774	0.760	0.096
Model 3	Two factors	9752.729	974	6732.723**	0.102	0.658	0.636	0.110
Model 4	One factor	13665.328	975	10645.322**	0.123	0.505	0.475	0.143

Note: AW = academic workload; SFS = separation from school; FOC = fears of contagion; PS = perceived stress; Two factors = AW+SFS+FOC+PS, Health; Three factors = AW+SFS+PS, FOC, Health; Four factors = AW+PS, SFS, FOC, Health.