Table 2. Hazard ratios and 95% confidence intervals for association between pandemic influenza vaccination and foetal death in different gestational periods.

	“Immunity model”		“Toxicity model”
	HR unadj	CI95	HR unadj	CI95
Foetal death in weeks 9–12	0.74	(0.62–0.88)	0.56	(0.43–0.73)
Foetal death in weeks 13–24	0.59	(0.45–0.77)	0.45	(0.28–0.73)
Foetal death in weeks 25–43	0.70	(0.47–1.03)	1.56	(0.73–3.34)