Table 1

Prevalence of caffeine consumption in four strata during and after pregnancy in SIDS cases and controls with crude and adjusted odds ratios (ORs) in Scandinavia 1992–95, the Nordic epidemiological SIDS study

Caffeine consumption		Cases		Controls		Crude				Adjusted for smoking in 1st trimester				Adjusted for maternal age, education, parity, and smoking in 1st trimester
Caffeine consumption		Cases		Controls		OR	95% CI			p Value	OR			95% CI	p Value	OR	95% CI	p Value
During pregnancy
Nil	34	160	1.0	Ref	Ref		1.0	Ref	Ref		1.0	Ref	Ref
1–400 mg/24 h	102	465	0.9	0.6 to 1.5	0.74		0.9	0.6 to 1.5	0.70		1.1	0.6 to 1.9	0.79
401–800 mg/24 h	57	119	2.0	1.2 to 3.4	0.009		1.2	0.7 to 2.2	0.46		1.5	0.8 to 3.0	0.20
> 800 mg/24 h	24	24	3.9	1.9 to 8.1	< 0.001		1.7	0.8 to 3.8	0.19		2.5	1.0 to 6.7	0.06

After pregnancy
Nil	28	109	1.0	Ref	Ref		1.0	Ref	Ref		1.0	Ref	Ref
1–400 mg/24 h	98	478	0.7	0.4 to 1.2	0.16		0.7	0.4 to 1.2	0.12		0.9	0.5 to 1.5	0.60
401–800 mg/24 h	59	158	1.2	0.7 to 2.1	0.45		0.9	0.5 to 1.6	0.20		1.0	0.5 to 2.0	0.91
> 800 mg/24 h	30	30	3.1	1.5 to 6.3	0.002		1.4	0.6 to 3.1	0.62		2.0	0.8 to 5.2	0.14

CI, confidence interval.