Odds ratios of being A) born preterm and B) born with a low birth weight for those conceived within a temporal cluster.d.

CI: 95% Confidence Interval.dOdds ratios are relative to conceptions outside of the cluster but within the time period window W in which the cluster is found. For example, the reference category for those in the 1994 conception cluster is those who were conceived outside of the cluster but within window W 1992/3/1 to 1995/3/1. Significant results are in bold.