Table 2 Coefficients for model of the fetal death sex ratio (i.e., male/female) in the United States (less California) for September, October, and November 2001. Standard errors appear in parentheses.
From: Male fetal loss in the U.S. following the terrorist attacks of September 11, 2001
Predictor | Initial model | Final model |
|---|---|---|
Constant | 1.143** (.0036) | 1.143** (.0035) |
ARIMA parameters | ||
   AR at 12 | -.4823** (.1132) | -.4713** (.1103) |
   AR at 3 | -.2558* (.1188) | -.2657* (.1164) |
September 11 variable lagged at: | ||
   September 2001 | .1279** (.0466) | .1232** (.0468) |
   October 2001 | .0196 (.0463) |  |
   November 2001 | .0076 (.0462) |  |