Table 1.

Age and gender-stratified mean levels of vitamin D, vitamin B12 and folic acid.

Parameters			Age group (years)	Gender		Female vs. Male ( t -test)
				Female	Male	T	P
Vitamin D (ng/ml)			45–54	21.60 (9.81)	25.65 (10.39)	−5.07	<0.001*
			55–64	20.69 (11.24)	24.19 (10.06)	−3.38	<0.001*
			65–74	20.65 (8.37)	27.62 (10.43)	−6.74	<0.001*
			≥75	18.21 (7.77)	30.34 (12.10)	−6.43	<0.001*
			Overall	20.94 (9.87)	26.21 (10.65)	−10.1	<0.001*
	Between age	F	3.73	2.01	7.74
	groups (ANOVA)	p	0.011*	0.11	<0.001*
Vitamin B12 (pg/ml)			45–54	252.20 (165.41)	269.90 (185.68)	−1.31	0.18
			55–64	287.95 (204.23)	267.74 (184.45)	1.11	0.26
			65–74	309.88 (212.41)	281.27 (196.93)	1.31	0.191
			≥75	335.39 (269.42)	307.90 (231.01)	0.59	0.55
			Overall	278.74 (195.59)	275.94 (193.20)	0.29	0.77
	Between age	F	4.99	5.68	1.012
	groups (ANOVA)	P	0.002*	<0.001*	0.38
Folate (ng/ml)			45–54	6.08 (3.08)	5.6 (3.04)	2.05	0.041*
			55–64	6.71 (4.10)	5.46 (3.11)	3.66	<0.001*
			65–74	6.68 (4.01)	5.98 (3.59)	1.73	0.08
			≥75	5.98 (4.18)	5.58 (3.62)	0.63	0.52
			Overall	6.37 (3.66)	5.65 (3.26)	4.2	<0.001*
	Between age	F	1.61	2.12	0.89
	groups (ANOVA)	P	0.18	0.095	0.44

This table shows the mean levels of vitamin D, vitamin B12 and folic acid in a rural, aging cohort from southern India. The data is stratified according to gender (female and male) and age-groups (45–54, 55–64, 65–74, and ≥75 years). Statistical significance in the difference in mean values between females and males (calculated using t-test) and difference in mean values (calculated using ANOVA) is represented as p-values.

^*p < 0.05 was considered as significant.