Table 3 Birth weight parameters for Danish pregnant women according to antibodies against C.burnetii , immunofluorescence antibody test (IFA)

Birth weight all (n = 842) Median Birth weight (interquartile range)

166

676

Mean difference in gram*: 204 g

168 g (95% CI:70–267 g)**

3780 g (3480 g; 4085 g)

3600 g (3260 g; 3997 g)

Birth weight children born at term (n = 803***) Median Birth weight (interquartile range)

163

640

Mean difference in gram*: 160 g

134 g (95% CI: 47–221 g)**

3790 g (3490 g; 4090 g)

3650 g (3309 g; 4000 g)

Small for gestational age term pregnancies (week 37+ (n = 82) Median Birth weight (interquartile range)

9

73

OR: 0.5

0.4 (95% CI: 0.8–1.0)**

2820 g (2275 g; 3010 g)

2850 g (2350 g; 3030 g)