Skip to main content

Table 2 Average hemoglobin and serum ferritin levels of participants by trimesters

From: Prevalence of anemia and iron deficiency anemia in Chinese pregnant women (IRON WOMEN): a national cross-sectional survey

Indicator

Sample

Total

First trimester

Second trimester

Third trimester

P value

Hemoglobin:

mean (SD)

All pregnancies

118.38 (11.52)

126.78 (10.20)

118.93 (11.27)

117.06 (11.32)

< 0.0011

Singletons

118.43 (11.49)

126.86 (10.23)

118.99 (11.25)

117.10 (11.26)

< 0.0011

Multiple gestations

116.47 (12.88)

123.44 (7.91)

117.17 (11.73)

114.86 (13.98)

0.011

Serum ferritin:

median (lower quartile-upper quartile)

All pregnancies

20.60 (11.79–36.97)

54.39 (34.5–94.01)

28.60 (16.40–50.50)

16.70 (10.20–27.00)

< 0.0012

Singletons

20.57 (11.7–36.80)

54.20 (34.37–93.35)

28.74 (16.40–50.49)

16.63 (10.20–26.9)

< 0.0012

Multiple gestations

23.65 (13.9–44.44)

75.7 (35.30–125.6)

25.0 (13.9–55.25)

19.7(12.1–35.00)

< 0.0012

  1. 1From One-way ANOVA
  2. 2From Kruskal-Wallis rank test