Prevalence of anemia and sociodemographic characteristics among pregnant and non-pregnant women in southwest China: a longitudinal observational study

Table 3 Association between the prevalence of anemia and socio-demographic characteristics among women of reproductive age in 2014–2018, southwest China

	Number	Anemia,n(%)	cOR(95%CI)	aOR^a(95%CI)
All participants	640,672	121,254(18.9)	-	-
Stage
Non-pregnancy	351,980	61,193(17.4)	1.00	1.00
First trimester	268,014	57,883(21.6)	1.31(1.29,1.33)	1.32(1.31,1.34)
Third trimester	20,678	2178(10.5)	0.56(0.54,0.59)	0.82(0.78,0.87)
Age group, years
18–20	54,792	13,007(23.7)	1.38(1.35,1.42)	1.28(1.25,1.31)
21–25	223,074	42,720(19.2)	1.02(1.01,1.04)	1.01(1.00,1.02)
26–30	211,066	37,577(17.8)	1.00	1.00
31–35	90,235	16,681(18.5)	1.01(0.98,1.03)	1.05(1.03,1.07)
> 35	61,505	11,259(18.3)	1.00(0.97,1.02)	1.07(1.05,1.10)
Occupation
Worker	51,277	7164(14.0)	1.00	1.00
Farmer	556,838	109,567(19.7)	1.51(1.47,1.55)	1.42(1.36,1.49)
Others	32,557	4523(13.9)	0.99(0.95,1.03)	1.04(0.99,1.09)
Ethnic
Han	413,746	70,297(17.0)	1.00	1.00
Yi	74,464	15,204(20.4)	1.25(1.23,1.28)	1.19(1.17,1.21)
Hani	21,277	5654(26.6)	1.77(1.71,1.83)	1.73(1.67,1.78)
Miao	18,214	4219(23.2)	1.47(1.42,1.53)	1.33(1.29,1.38)
Others	112,971	25,880(22.9)	1.45(1.43,1.48)	1.41(1.39,1.43)

^aMultivariate model adjusted for pregnancy stage, age, occupation, ethnic, investigation year and history of childbirth among women of reproductive age
The stage was taken as the reference by non-pregnancy, the age was taken as the reference by the age group of 26–30 years, the occupation was taken as the reference by workers, the ethnic was taken as the reference by the Han

ISSN: 1471-2393