Table 2

Comparison of obstetric information of the cases and their matched controls

Characteristic

Cases (%)

Controls (%)

P-value

Odds Ratio (95% CI*)

Hypertensive complications during pregnancy

26.5%

13.7%

0.03

2.6 (1.1 to 4.6)

Medication use for high blood pressure

8.8%

3.9%

0.16

2.4 (0.7 to 7.9)

IUGR**

13.7%

3.9%

0.02

3.9 (1.2 to 12.3)

Miscarriage

32.7%

21.6%

0.08

1.8 (0.9 to 3.3)

*CI, confidence interval; **IUGR, intra uterine growth restriction.

van Wyk et al. Arthritis Research & Therapy 2011 13:R183   doi:10.1186/ar3510