Table 5. Changes of NF and ML at time points compared to the previous 1 month

	F	T0-T1		T1-T2		T2-T3
		Mean difference	p	Mean difference	p	Mean difference	p
Right NF (mm)	103.087	0.67 ± 0.14	0.01	1.10 ± 0.07	0.000	0.12 ± 0.08	0.811
Center NF (mm)	54.343	0.65 ± 0.12	0.000	0.57 ± 0.11	0.000	0.17 ± 0.06	0.092
Right ML (mm)	37.752	0.47 ± 0.10	0.01	0.50 ± 0.12	0.03	0.10 ± 0.06	0.622
Center ML (mm)	44.880	0.40 ± 0.10	0.05	0.45 ± 0.09	0.01	0.07 ± 0.04	0.497