Table 2

The effect of maternal CO exposure on total number of early gestational demise/late gestational death

CO (ppm)

Total Implantation sites/litter

Total live fetuses/litter

**EGD (%)

RR of EGD (CI)

**LGD (%)

RR of LGD (CI)


0

12.8

12.6

1.12

0.56


25

12.2

11.9

2.40

2.15 (0.42, 10.95)

0.48

0.86 (0.05, 13.66)


60

12.8

12.4

1.81

1.62 (0.27, 0.96)

1.20

2.16 (0.20, 23.56)


100

14.2

13.9

0.78

0.70 (0.06, 7.63)

1.56

1.40 (0.09, 22.15)


150

13.6

13.5

0.92

0.82 (0.08, 8.95)

0.00

0.00


200

10.9

10.5

1.15

1.03 (0.09, 11.19)

2.30

1.74 (0.38, 44.76)


250

12.9

12.4

2.91

2.67 (0.44, 15.34)

0.90

1.74 (0.11, 27.49)


330

13.9

12.1

8.80*

7.88 (1.78, 34.92)

4.00

7.16 (0.85, 60.54)


400

13.7

8.2*

13.40*

12.01 (2.72, 52.94)

26.83*

48.02 (6.59, 350.20)


EGD: early gestational demise LGD: late gestational death RR: relative risk

CI: confidence interval

Statistical Analysis: Chi squared test, using the fisher exact method to compare EGD or LGD to total implantation sites - EGD or LGD and analysis of variance for live fetuses/litter (*p < 0.05).

**Equations: EGD (%): Total EGD/(Total Implantation Sites- EGD)*100, LGD (%): Total LGD/[(Total Implantation Sites-(EGD + LGD)]*100

Venditti et al. BMC Pregnancy and Childbirth 2011 11:101   doi:10.1186/1471-2393-11-101

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