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Table 2 Median (P25–P75) concentration of cadmium (Cd) and lead (Pb) assessed in cord tissue (dry weight) in neural tube defect cases and controls

From: Associations between prenatal exposure to cadmium and lead with neural tube defect risks are modified by single-nucleotide polymorphisms of fetal MTHFR and SOD2: a case–control study

Metal

All subjects

Cases

Controls

P a

Maximum–minimum

Cd (ng/g)

1.10 (0.48–3.09)

1.30 (0.57–3.49)

0.93 (0.44–2.68)

0.026

23.411–0.034

Pb (ng/g)

26.18 (17.97–48.58)

27.32 (18.37–50.34)

24.62 (17.17–46.86)

0.211

225.572–4.330

  1. Abbreviations: P25 25th percentile, P75 75th percentile
  2. aComparison of median values between two groups conducted using the Mann–Whitney U test