Table 4. Ordinal regression analysis of NPY genotype and MDD.

	n a	β b	95%-CI c	p
All subjects, adjusted for age and sex	113, 39	1.24	0.39, 2.09	0.004
All subjects, unadjusted	113, 39	0.83	0.11, 1.55	0.024
All subjects, adjusted for age, sex, and race	113, 39	1.20	0.33, 2.07	0.007
Female only, adjusted for age	44, 34	1.39	0.43, 2.35	0.005
Caucasian only, adjusted for age and sex	77, 27	1.14	0.12, 2.16	0.029
Age- and sex-matched samples	25, 39	0.94	-0.05, 1.93	0.062

^aNumber of healthy participants and MDD patients, respectively

^bParameter estimate from ordinal regression

^cConfidence interval for parameter β