Table 1.

RR for the mother’s having a later kidney biopsy according to whether she had preeclampsia during pregnancy and birth weight of infant, in different adjustment models: Childbirths 1967 to 1998 and kidney biopsies April 1988 to 2002, Norwaya

ModelBirth WeightAll WomenWomen without Diabetes or Kidney or Rheumatic Disease before Pregnancy
nRRP TrendnRRP Trend
Model 0
    no preeclampsia≥2.5 kg4741.0<0.0014441.0<0.001
1.5 to 2.5 kg321.8 (1.3 to 2.6)271.6 (1.1 to 2.4)
<1.5 kg152.8 (1.7 to 4.7)102.1 (1.2 to 3.8)
    preeclampsia≥2.5 kg382.4 (1.7 to 3.3)322.2 (1.5 to 3.1)
1.5 to 2.5 kg134.8 (2.8 to 8.2)114.5 (2.5 to 8.0)
<1.5 kg1517 (10 to 29)1114 (7.8 to 26)
Model 1
    no preeclampsia≥2.5 kg4741.0<0.0014441.0<0.001
1.5 to 2.5 kg321.7 (1.2 to 2.5)271.6 (1.1 to 2.4)
<1.5 kg153.1 (1.7 to 3.3)102.4 (1.2 to 4.7)
    preeclampsia≥2.5 kg382.3 (1.7 to 3.3)322.2 (1.5 to 3.1)
1.5 to 2.5 kg134.5 (2.6 to 7.8)114.4 (2.4 to 8.0)
<1.5 kg1517 (10 to 30)1115 (7.9 to 28)
Model 2
    no preeclampsia≥2.5 kg4551.0<0.0014261.0<0.001
1.5 to 2.5 kg291.4 (0.94 to 2.2)251.4 (0.92 to 2.3)
<1.5 kg132.0 (0.98 to 3.9)91.7 (0.77 to 3.8)
    preeclampsia≥2.5 kg382.4 (1.7 to 3.4)322.2 (1.6 to 3.2)
1.5 to 2.5 kg113.4 (1.9 to 6.3)103.8 (2.0 to 7.2)
<1.5 kg1412 (6.3 to 23)1011 (5.3 to 23)
  • a RR, relative risk. Model 0, no adjustment; model 1, adjustment for maternal age, year of childbirth, offspring small for gestational age, stillbirth, and marital status; model 2, model 1 + offspring gestational age.