title: An association of maternal age and birth weight with end-stage renal disease in Saskatchewan. Sub-analysis of registered Indians and those with diabetes.
abstract: OBJECTIVE
  To determine links between birth related factors and end-stage renal disease (ESRD).
  
  
  METHODS
  This 1:3 age, sex, and source population (registered Indians [SkRI] and other Saskatchewan people [OSkP]) matched case-control study, compared maternal age and parity, gestational age, low birth weight (LBW), and high birth weight (HBW), between subjects with and without ESRD.
  
  
  RESULTS
  Of 1,162 subjects, 277 cases (48 SkRI and 229 OSkP) and 601 controls (112 SkRI and 489 OSkP) had birth weight information. A trend for increased LBW rates occurred among SkRI and OSkP cases compared to controls (10.4 vs. 5.3% and 6.6 vs. 4.3%), and was significant for OSkP female cases (OR 3.66; 95% confidence interval [CI] 1.05, 12.73). Higher HBW rates occurred in SkRI cases (14.6% compared to 11.6% controls; N/S), and 3/5 female SkRI diabetic ESRD (DESRD) cases were over 3,750 g compared to 1/14 controls (p < 0.05). Only maternal age >/=30 years was an independent predictor for ESRD, particularly for OSkP non-DESRD cases (OR 2.45; 95% CI 1.03, 5.8). Cases with older mothers had lower mean birth weights than controls (3,236 vs. 3,434 g; p = 0.005).
  
  
  CONCLUSIONS
  Older maternal age may predispose offspring to ESRD through mechanisms that differ for DESRD versus non-DESRD, and that may relate to ethnicity.
authors.affiliation: Department of Medicine and Community Health, University of Saskatchewan, and Population Health Branch, Saskatchewan, Canada. dyck@sask.usask.ca
authors.forename: Roland
authors.initials: R
authors.lastname: Dyck
authors.forename: Helena
authors.initials: H
authors.lastname: Klomp
authors.forename: Leonard
authors.initials: L
authors.lastname: Tan
authors.forename: Mary Rose
authors.initials: MR
authors.lastname: Stang
mesh_terms: D000293:Adolescent; D000328:Adult; D001724:Birth Weight; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007676:Kidney Failure, Chronic / Q000453:epidemiology*; D008297:Male; D008423:Maternal Age; D015999:Multivariate Analysis; D016017:Odds Ratio; D010298:Parity; D011247:Pregnancy; D011248:Pregnancy Complications; D012525:Saskatchewan / Q000453:epidemiology