. 2020 Sep 16;24(7):1787–1797. doi: 10.1017/S1368980020002943

Table 1.

General characteristics of Iranian women across tertiles of energy-adjusted dietary B-vitamin intake

			Vitamin B₆ (mg/d)							Vitamin B₉ (µg/d)							Vitamin B₁₂ (µg/d)
			<1·21		1·21–1·47		>1·47			<286·71		286·71–354·80		>354·80			<3·66		3·66–4·90		>4·90
	n 447		n 149		n 149		n 149			n 149		n 149		n 149			n 149		n 149		n 149
Variables	n	%	n	%	n	%	n	%	P value^*	n	%	n	%	n	%	P value^*	n	%	n	%	n	%	P value^*
Age (year)									0·18							0·51							0·41
Mean	31·68		31·78		30·81		32·43			31·59		31·22		31·68			32·30		31·60		31·68
sd	7·64		7·90		7·73		7·23			7·61		7·97		7·64			7·65		8·14		7·64
Weight (kg)									0·82							0·15							0·6
Mean	64·22		64·09		63·88		64·70			64·18		62·94		65·55			64·87		63·53		64·27
sd	11·61		11·45		11·60		11·84			12·05		11·23		11·47			12·17		11·31		11·38
BMI (kg/m²)									0·78							0·12			24·17	4·11	24·21	4·27	0·73
Mean	24·30		24·50		24·17		24·24			24·27		23·81		24·83			24·53		63·53		64·27
sd	4·29		4·42		4·24		4·22			4·63		3·90		4·27			4·49		11·31		11·38
Physical activity									0·19							0·07							0·49
Mean	39·73		39·11		39·63		40·44			38·99		39·54		40·65			40·12		30·24		39·81
sd	6·46		5·08		7·66		6·34			6·26		5·89		7·08			6·69		6·37		6·32
Hours spent outside home									0·44							0·93							0·11
Mean	6·10		6·37		6·11		5·82			6·05		6·19		6·06			5·95		5·74		6·61
sd	3·73		3·89		3·54		3·75			3·57		3·83		3·80			3·73		3·60		3·82
Sleep (hours)									0·41							0·04							0·83
Mean	7·77		7·89		7·66		7·74			7·63		8·02		7·65			7·80		7·79		7·71
sd	1·49		1·56		1·28		1·61			1·36		1·51		1·57			1·46		1·59		1·42
Overweight and obesity
Yes	164	37	58	39	51	34	55	37	0·7	56	38	50	34	58	39	0·6	57	38	56	38	51	34	0·74
No	283	63	91	61	98	66	94	63		93	62	99	66	91	61		92	62	93	62	98	66
Supplement use^†
Yes	164	37	49	33	54	36	61	41	0·35	62	42	56	38	46	31	0·15	49	33	57	38	58	39	0·49
No	283	63	100	67	95	64	88	59		87	58	93	62	103	69		100	67	92	62	91	61
Drug use^‡
Yes	37	8	16	11	11	7	10	7		16	11	6	4	15	10		12	8	15	10	10	7
No	410	92	133	89	138	93	139	93	0·4	133	89	143	96	134	90	0·06	137	92	134	90	139	93	0·57
Marital status
Married	273	61	91	61	93	62	89	60	0·45	93	62	83	56	97	65	0·05	92	62	90	60	91	61	0·71
Single/Divorced	174	39	88	12	56	38	60	40		87	38	66	44	52	35		87	38	89	40	88	39
Body image
Yes	306	68	93	62	109	73	104	70	0·12	92	62	107	72	107	72	0·09	98	66	98	66	110	74	0·22
No	141	32	56	38	40	27	45	30		57	38	42	28	42	28		51	34	51	34	39	26
Family history of chronic diseases
Yes	230	51	70	47	77	52	83	56	0·32	75	50	79	53	76	51	0·89	76	51	76	51	78	52	0·96
No	217	49	79	53	72	48	66	44		74	50	70	47	73	49		73	49	73	49	71	48
Socio-economic status
Weak	174	39	63	42	59	40	52	35	0·74	65	44	54	36	55	37	0·56	59	40	54	36	61	41	0·26
Moderate	117	26	38	26	39	26	40	27		39	26	41	28	37	25		46	31	40	27	31	21
Strong	156	35	48	32	51	34	57	38		45	30	54	36	57	38		44	30	55	37	57	38
Depression
Yes	137	31	60	40	42	28	35	23	0·005	54	36	49	33	34	23	0·03	37	25	50	34	50	34	0·16
No	310	69	89	60	107	72	114	77		95	64	100	67	115	77		112	75	99	66	99	66
Anxiety
Yes	145	32	64	43	42	28	39	26	0·003	62	42	48	32	35	23	0·004	47	32	45	30	53	36	0·58
No	302	68	85	57	107	72	110	74		87	58	101	68	114	77		102	68	104	70	96	64
Psychological distress
Yes	157	35	63	42	49	33	45	30	0·07	65	44	50	34	42	28	0·01	46	31	51	34	60	40	0·22
No	290	65	86	58	100	57	104	70		84	56	99	66	107	72		103	69	98	66	89	60

ANOVA was calculated for continuous variables and the χ² test for categorical variables.

^†

Multivitamin and mineral supplements, n-3, vitamin D, and vitamin B supplements.

^‡

Gastrointestinal medications.