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Table 3 Pregnancy conditions by residence, generation, and adjusted by generation, 1983-2014

From: Reproductive outcomes after non-occupational exposure to hexavalent chromium, Willits California, 1983-2014

Condition Rate (%) Relative Risk per Delivery Chi-sq P-Value
Discharges Within Generation Adj by Generation
ROC Willits 1950 1970 Ratio LCL UCL CMH BD
 Pregnancy admissions 31444 5558        
 Deliveries 27049 4704        
 Non-delivery admissions 4395 854        
General health in pregnancy
 Body system condition (Any) 24.62 26.11 0.96 1.12 1.08 1.03 1.13 0.0007 0.0026
 Infectious/parasitic 9.94 10.94 1.24 1.11 1.13 1.04 1.22 0.0033 0.5211
 Endocr Nutri Metab Immun 3.65 4.12 1.02 1.19 1.15 1.00 1.32 0.0434 0.3686
 Blood/blood-forming organs 5.07 4.35 0.90 0.87 0.88 0.77 1.00 0.0476 0.8029
 Mental disorders 4.64 6.42 1.06 1.53 1.41 1.26 1.58 0.0000 0.0082
 Nervous system sense 1.20 1.53 0.54 1.64 1.30 1.03 1.64 0.0281 0.0007
 Circulatory system 1.57 1.71 0.82 1.19 1.11 0.89 1.38 0.3499 0.2037
 Respiratory system 2.11 2.68 1.05 1.39 1.30 1.09 1.54 0.0037 0.1854
 Digestive system 2.32 2.30 0.73 1.15 1.01 0.84 1.22 0.9037 0.0353
 Genitourinary system 3.32 3.65 1.00 1.18 1.12 0.97 1.30 0.1282 0.3181
Pregnancy, birth, puerperium
 Hemorrhage in pregnancy 2.28 1.93 0.84 0.88 0.86 0.70 1.05 0.1342 0.8023
 Hypertension in pregnancy 5.92 6.23 1.06 1.08 1.07 0.96 1.20 0.2248 0.8541
 Early labor 9.97 10.67 1.09 1.09 1.09 1.00 1.18 0.0451 0.9549
 Long pregnancy 7.25 6.71 1.06 0.92 0.95 0.85 1.05 0.2907 0.2508
 Diabetes mellitus in pregnancy 5.64 4.28 0.94 0.71 0.77 0.68 0.88 0.0001 0.0383
 Malposition 6.04 6.12 1.07 1.00 1.03 0.92 1.15 0.5937 0.5094
 Pelvic obstruction 5.21 4.84 0.87 1.02 0.94 0.83 1.07 0.3675 0.2110
 Previous Cesarean-section 10.37 10.04 1.01 0.96 0.98 0.91 1.07 0.7226 0.5905
 Fetal distress 17.89 17.27 1.03 0.94 0.98 0.92 1.04 0.5634 0.1395
 Premature rupture amniotic fluid 4.56 4.28 0.95 0.96 0.95 0.84 1.09 0.4954 0.8935
 Hydramnios 2.04 1.53 0.55 0.87 0.76 0.61 0.95 0.0170 0.0827
 Umbilical cord 17.87 18.01 1.12 0.98 1.03 0.97 1.09 0.3750 0.0311
 Other: Reproductive anomaly 2.26 2.28 0.98 1.06 1.03 0.86 1.24 0.7518 0.6947