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Table 2 Previous health examination studies in Oppland during 1970s – 990 s, which can be linked to NORSE

From: Cohort profile: Norwegian survey of health and ageing (NORSE)

  County Year Invited (N) Participated (%)** Birth cohort Age at survey Age in 2017
Counties Study Oppland Wave I: 1976–8 N = 28,068 92% 1925–41 35–49 76–92
Counties Study Oppland Wave II: 1981–3 91% 1925–41 40–58 76–92
Counties Study Oppland Wave III: 1986–8 87% 1925–41 45–63 76–92
40-year surveys Oppland 1991 N = 13,196 73% 1947–51 40–42 66–70
40-year surveys Oppland 1993–4 N = 7532 73% 1952–54 40–42 63–65
40-year surveys Oppland 1997–8 N = 7820 68% 1955–57 40–42 60–62
  1. Source: https://www.fhi.no/div/helseundersokelser/landsomfattende-helseundersokelser-lhu/helseundersokelser/fylkesundersokelsene-i-finnmark-sog/
  2. ** Estimated from page 66–67 from this report https://www.fhi.no/globalassets/dokumenterfiler/studier/helseundersokelsene/oversikt-over-fylker-og-arskull-40-aringsundersokelser.pdf
  3. Based on numbers in Table 2 (92% of the birth cohort 1925–41, 73% of the 1947–54 cohorts and 68% of the 1955–57 cohorts participated) we estimate that 553 (58%) NORSE participants will have participated in one or more of these previous health examination studies in the former county of Oppland