Table 1

FRRs in Utah and Sweden

UtahSweden
All first degreeOffspringSiblingsSpouses
AllEarly onsetRatioaAllOnset <50RatioAllOnset <50Ratio
Number of sites269917161617171717
Median FRR2.24.11.91.94.22.23.51.11.01.0
Range1.3–8.61.8–9.01.0–4.51.5–9.51.9–15.61.0–3.92.0–12.40.4–1.40.0–2.90.0–2.5
  • a SIR, standardized incidence ratios.

  • a Ratio is the ratio of FRRs for early onset versus all index cases. In Utah, early onset is defined as before age 50 or age 60, depending on site.