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Table 2 Median, 25–75 percentiles and proportions of SF, ST and their ratio in late pregnancy

From: Iron deficiency in late pregnancy and its associations with birth outcomes in Chinese pregnant women: a retrospective cohort study

 

N

25th percentile

Median

75th percentile

Percent deficient a

All women (N = 11,581)

 SF (μg/L)

11,569

8.3

11.6

20.2

51.82

 ST (g/L)

11,576

3.64

4.09

4.58

54.43

 ST/SF ratio log10 transform

11,564

5.28

5.55

5.72

53.9

Women with hsCRP5 ≤ mg/L (N = 8597)

 SF (μg/L)

8591

8

11.2

19.2

54.27

 ST (g/L)

8594

3.67

4.11

4.62

56.23

 ST/SF ratio log10 transform

8588

5.3

5.57

5.74

56.29

  1. a Percent deficient was defined as SF < 12 μg/L, ST >  4 g/L and ST/SF ratio log10 transform > 5.52
  2. Abbreviations: SF serum ferritin, ST serum transferrin, hsCRP high sensitivity C-reactive protein