Table 2.

Serum NGF-β, BDNF, and 1,25(OH)₂D levels between patients and healthy controls (HC)

	Patients (n = 72)	HC (n = 70)	t	P
NGF-β (pg/mL)	2.25 ± 1.18	4.34 ± 1.27	-10.145	< 0.001
BDNF (ng/mL)	25.65 ± 7.43	37.86 ± 15.0	-6.172	< 0.001
1,25(OH)₂D (pmol/L)◊	2.19 ± 0.10	2.24 ± 0.17	-2.265	0.025

◊ results of natural logarithm transformation