Table 1.

comparison of respondents characteristics by tertiles of energy-adjusted dietary iron intakes

			Tertiles of energy-adjusted dietary iron intakes
Characteristic		All	T1	T2	T3	P
n			144	145	143
Age (in years)		28.5 ± 4.6	28.2 ± 4.4	29.0 ± 4.3	28.5 ± 5.0	0.363
16 - 24		86 (19.9)	33 (38.4)	22 (25.6)	31 (36.0)	0.208
≥ 25		346 (80.1)	111 (32.1)	123 (35.5)	112 (32.4)
Gestational age (weeks)		31.3 ± 4.1	31.4 ± 4.0	31.1 ± 4.2	31.4 ± 4.0	0.751
Primigravidae	No	226 (52.3)	78 (34.5)	77 (34.1)	71 (31.4)	0.726
Yes	Yes	206 (47.7)	66 (32.0)	68 (33.0)	72 (35.0)
Parity		1.8 ± 0.9	1.7 ± 0.9	1.7 ± 0.9	1.9 ± 0.9	0.542
	≤2	182 (80.5)	63 (34.6)	63 (34.6)	56 (30.8)	0.597
	>2	44 (19.5)	13 (29.5)	14 (31.8)	17 (38.9)
Education	Secondary	203 (47.3)	62 (30.5)	66 (32.5)	75 (36.9)	0.263
	Tertiary	226 (52.7)	80 (35.4)	79 (35.0)	67 (29.6)
Marital status	Never married	20 (4.6)	04 (20.0)	09 (45.0)	07 (35.0)	0.369
	Married	411 (95.4)	140 (34.1)	135 (32.8)	136 (33.1)
Monthly income	≤ N16,000	27 (29.2)	06 (21.4)	08 (32.1)	13 (46.4)	0.261
	> N16,000	68 (70.8)	22 (32.4)	26 (38.2)	20 (29.4)
Dietary Fe intake (mg/day)		20.3 ± 3.3	16.6 ± 1.4	19.7 ± 1.0*	23.7 ± 2.0*	0.000
Energy (Kcal)		2822.5 ± 129.3	2841.4 ± 112.2	2789.8 ± 115.5*	2836.5 ± 151.4*	0.001
PCV (%)		31.8 ± 2.8	32.1 ± 2.6	31.7 ± 3.2	31.5 ± 2.6	0.279
Haemglobin (g/L)		97.9 ± 12.9	89.6 ± 9.1	98.4 ± 10.8	105.8 ± 13.0*	0.000
Anaemia	No	70 (16.2)	04 (2.8)	09 (6.2)	57 (39.9)	0.000
	Yes	362 (83.8)	140 (97.2)	136 (93.8)	86 (60.1)

Continuous data are presented as mean ± SD and compared using one-way ANOVA with a least significant difference as a posthoc test (using the first tertile as reference); categorical data are presented as n (%) and compared using the chi-square test; *mean values were significantly different compared to the first tertile