Table 2.

Number of women in subgroup, according to pregnancy-related variables and diagnoses at kidney biopsy: Norway, childbirths 1967 to 1998 and kidney biopsies 1988 to 2002a

Pregnancy-Related VariablesCategoryNo Kidney BiopsyKidney BiopsyMPGNOther Immune Complex GNFSGS or MCDOther Pathological FindingsNormal Findings or Unrepresentative Biopsy
n%bn%bn%bn%bn%bn%bn%b
Offspring birth weight<1.5 kg9,5121.3315.342.189.651095.055.6
1.5 to 2.49 kg29,6093.9447.5189.644.836.3126.777.8
2.5 to 4.49 kg699,50093501851628770843879156877583
≥4.5 kg15,7442.1111.931.611.224.221.133.3
Offspring gestational<32 wk10,2591.4234.131.791137.163.522.4
    age32 to 36 wk35,0994.9468.2189.944.924.8148.189.5
37 to 41 wk548,10277420751317263773379130766375
≥42 wk117,767177213291667.349.522131113
Offspring small forYes65,1708.675132212121436.326151213
    gestational ageNo690,662513166714515378
StillbirthYes8,1301.1142.442.144.812.131.722.2
No747,702574184794717388
GestationalYes13,2201.7183.163.222.40042.266.7
    hypertensionNo742,612570182814817584
PreeclampsiaYes29,2513.9661121111113919137.91213
No726,581522167723916678
Diabetes beforeYes1,9800.381.410.556.00021.101.1
    pregnancyNo753,852580187784817790
Kidney diseaseYes1,9910.3264.473.756.061363.422.2
    before pregnancyNo753,841562181784217388
Rheumatic diseaseYes2,1950.3233.942.178.312.173.944.4
    before pregnancyNo753,637565184764717286
  • a FSGS, focal and segmental glomerulosclerosis; MCD, minimal-change disease; MPGN, mesangioproliferative glomerulonephritis.

  • b Percentage within category of pregnancy-related variable.