Table 3.

Ocular graft-versus-host disease (GVHD) severity and serum vitamin A levels in patients with or without systemic GVHD.

	Age	Dry eye syndromes	Ocular GVHD grade	The serum levels of vitamin A
GVHD	32.79 ± 10.40	9.05 ± 4.59	0.74 ± 0.56	0.71 ± 0.25
Non-GVHD	33.26 ± 7.68	7.30 ± 3.38	0.70 ± 0.54	0.71 ± 0.26
t	0.176	1.496	0.849	0.073
P	0.861	0.142	0.274	0.942

P, the results of each stage after treatment and before treatment were compared, respectively.