[Prevalence and trends of anemia among pregnant women in eight provinces of China from 2016 to 2020].

This study analyzed the anemia status and change trend of 219 835 pregnant women in eight provinces from 2016 to 2020 in the Maternal and Newborn Health Monitoring Program(MNHMP). The results showed that from 2016 to 2020, the anemia rate of pregnant women in eight provinces was 41.27%, and the rates of mild, moderate and severe anemia were 28.56%, 12.59% and 0.12% respectively; the anemia rates in eastern, central and western regions were 41.87%, 36.09% and 44.63% respectively, and the anemia rates in urban and rural areas were 39.87% and 42.23%. From 2016 to 2020, the anemia rate of pregnant women decreased from 44.93% to 38.22%, with an average annual decline of 3.86% (95% CI :-5.84%, -1.85%). The anemia rate among pregnant women of the eastern region (AAPC=-6.16%, 95% CI :-9.79%, -2.38%) fell faster than that among pregnant women of the central region (AAPC=0.71%, 95% CI :-6.59%, 8.57%) and western region (AAPC=-1.53%, 95% CI :-5.19%, 2.28%). From 2016 to 2020, the moderate anemia rate in pregnant women decreased from 14.98% to 10.74%, with an average annual decline of 8.72% (95% CI :-12.90%, -4.34%), with a statistically significant difference ( P <0.05); AAPC for mild and severe anemia in pregnant women was 1.56% (95% CI : 3.44%, 0.36%) and 18.86% (95% CI : 39.88%, 9.52%), respectively, without statistically significant difference ( P >0.05).