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. 2018 May 5;19:189–197. doi: 10.1016/j.dib.2018.04.130

Table 3.

Motor skills in children at age 7 years by category of prenatal lead, cadmium or mercury exposure: complete cases (n = 1558).

Prenatal blood lead
 Prenatal blood cadmium
 Prenatal blood mercury
OR (95% CI) p OR (95% CI) p OR (95% CI) p
Balance Heel to toe: ref 15 steps (vs 1–14)
 Unadjusted 1.08 (0.81, 1.43) 0.610 0.84 (0.69, 1.02) 0.081 1.14 (0.94, 1.40) 0.190
 Model 1a 0.99 (0.74, 1.33) 0.933 0.86 (0.69, 1.07) 0.169 1.05 (0.85, 1.29) 0.663
 Model 2b 0.98 (0.73, 1.33) 0.929 0.87 (0.70, 1.08) 0.201 1.06 (0.86, 1.31) 0.580
Ball skills Beanbag: ref 7–10 throws (vs 1–3)
 Unadjusted 0.86 (0.58, 1.23) 0.442 1.05 (0.79, 1.40) 0.751 1.12 (0.83, 1.50) 0.441
 Model 1a 0.88 (0.58, 1.32) 0.540 1.04 (0.76, 1.42) 0.805 1.15 (0.85, 1.56) 0.352
 Model 2b 0.88 (0.58, 1.33) 0.539 1.05 (0.77, 1.43) 0.778 1.16 (0.86, 1.57) 0.341
Manual dexterity Threading lace: ref 9–21 s (vs 22–105)
 Unadjusted 1.06 (0.80, 1.41) 0.676 0.88 (0.72, 1.07) 0.195 0.87 (0.72, 1.07) 0.181
 Model 1a 1.12 (0.83, 1.50) 0.468 0.85 (0.68, 1.05) 0.129 0.89 (0.72, 1.10) 0.293
 Model 2b 1.12 (0.83, 1.50) 0.470 0.84 (0.68, 1.04) 0.113 0.89 (0.72, 1.10) 0.290
Peg board
 Preferred hand: ref 15–22 s (vs 23–46)
  Unadjusted 1.14 (0.86, 1.52) 0.371 0.99 (0.81, 1.21) 0.904 0.94 (0.77, 1.15) 0.519
  Model 1a 1.19 (0.88, 1.60) 0.256 0.95 (0.76, 1.18) 0.625 0.97 (0.78, 1.20) 0.756
  Model 2b 1.18 (0.88, 1.60) 0.266 0.94 (0.76, 1.17) 0.600 0.96 (0.78, 1.19) 0.709
 Non-preferred hand: ref 15–25 s (vs 25–62)
  Unadjusted 1.06 (0.80, 1.41) 0.678 0.95 (0.78, 1.16) 0.595 0.82 (0.67, 1.00) 0.053
  Model 1a 1.14 (0.85, 1.54) 0.372 0.91 (0.74, 1.13) 0.403 0.85 (0.69, 1.05) 0.122
  Model 2b 1.13 (0.84, 1.52) 0.406 0.92 (0.74, 1.14) 0.428 0.84 (0.68, 1.04) 0.114

Reference categories: lead < 5.00 µg/dl, cadmium < 0.25 µg/l, mercury < 2.00 µg/l.

Participants with poor attention to task excluded.

a

Model 1 adjusted for: sex, maternal education, smoking in pregnancy, alcohol in pregnancy, maternal age and parity.

b

Model 2 adjusted for: sex, maternal education, smoking in pregnancy, alcohol in pregnancy, maternal age, parity and gestational age at prenatal blood sampling.