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

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

Outcome	Time		Residence			Adj Rel Risk			Chi-sq P-Value
Outcome	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

ISSN: 1476-069X