Table 2 Summary information for the births included in the study by congenital anomaly status.

From: An evaluation of metrics for assessing maternal exposure to agricultural pesticides

Characteristic Birth defects (n=6358) No birth defects (n=298,548) P-value
Mean birth weight in grams 3,106.69 (798.23) 3,334.40 (557.75) <0.0001
Mean gestational age in weeks 38.09 (3.42) 39.09 (2.33) <0.0001
Maternal age (%)    0.0322
 <20 12.25 11.34 0.0231
 20–24 25.51 26.41 0.1088
 25–29 26.22 26.98 0.1751
 ≥30 36.02 35.27 0.2189
Maternal race/ethnicity (%)    0.0320
 Black/non-Hispanic 22.98 21.87 0.0339
 Hispanic 13.37 13.91 0.2175
 Other 3.48 3.98 0.0418
 White/non-Hispanic 60.18 60.24 0.9134
Maternal education (%)    <0.0001
 <High school 24.10 22.19 0.0003
 High school 30.04 28.74 0.0229
 >High school 45.86 49.08 <0.0001
Previous live births (%)    0.0019
 None 41.55 41.22 0.5900
 One 31.83 33.71 0.0017
 >One 26.61 25.07 0.0051
Smoked during pregnancy (%) 13.59 12.42 0.0050
Diabetes (%) 4.45 2.75 <0.0001
Married (%) 61.64 63.98 0.0001
  1. SDs are presented in parentheses for continuous variables. P-values were obtained through two-sample t-tests for continuous variables and chi-square tests for categorical variables. Individual category comparisons are considered when the overall chi-square test (bold P-value) is significant at the 0.05 level.