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Coefficients (standard errors in parentheses) for base and test models predicting the number of live periviable births in 240 monthly California conception cohorts beginning 1/1991 and ending 12/2010.
| Base Model | Test Model | |
|---|---|---|
| Binary variable scored 1 from April 2007 to December 2010 | 3.058* (1.502) | |
| Population at risk (in 1000’s) | 2.208** (0.144) | 2.195** (0.158) |
| Autocorrelation |
None | None |
p<.05; two-tailed test
p<.01;two-tailed test
