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Table 4 Non-delivery pregnancy events per 10,000 deliveries by time measure, period and residence, 1983-2014

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

Outcome Time Residence Adj Rel Risk Chi-sq P-Value
Measure Period ROC Willits RR Ratio LCL UCL CMH BD
Return home still Generation 1950-1969 1273 1461 1.15      
 Pregnant   1970-1989 1075 1027 0.96 1.05 0.97 1.14 0.2614 0.0310
Plant 1983-1996 1350 1541 1.14      
  1997-2014 1005 930 0.93 1.04 0.96 1.13 0.3173 0.0144
Pregnancy termination Generation 1950-1969 433 539 1.25      
  1970-1989 223 303 1.36 1.29 1.11 1.50 0.0011 0.6197
Plant 1983-1996 400 488 1.22      
  1997-2014 245 336 1.37 1.28 1.10 1.50 0.0014 0.4798
 Ectopic pregnancy Generation 1950-1969 209 200 0.96      
  1970-1989 77 126 1.63 1.17 0.92 1.50 0.2081 0.0369
Plant 1983-1996 199 193 0.97      
  1997-2014 82 129 1.57 1.16 0.91 1.48 0.2420 0.0566
 Spontaneous abortion Generation 1950-1969 51 91 1.78      
  1970-1989 25 46 1.83 1.80 1.20 2.68 0.0038 0.9490
Plant 1983-1996 45 85 1.88      
  1997-2014 29 49 1.66 1.79 1.19 2.67 0.0042 0.7703
 Therapeutic D&C Generation 1950-1969 141 234 1.66      
  1970-1989 90 111 1.23 1.47 1.15 1.88 0.0020 0.2449
Plant 1983-1996 135 233 1.72      
  1997-2014 93 105 1.13 1.46 1.14 1.87 0.0024 0.1080