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Table 2 Predictors for long-term participation in RHINE, Italian ECRHS and ISAYA, odds ratios with 95% confidence intervals

From: Longterm follow-up in European respiratory health studies – patterns and implications

Study centre   10-yrs follow-up 20-yrs follow-up
RHINE 20-25 yrs Ref Ref
  25-30 yrs 1.18 (1.08, 1.29) 1.15 (1.06, 1.24)
  30-35 yrs 1.30 (1.19, 1.42) 1.31 (1.20, 1.42)
  35-40 yrs 1.33 (1.21, 1.46) 1.40 (1.29, 1.52)
  40-44 yrs 1.55 (1.40, 1.72) 1.59 (1.45, 1.73)
  Men Ref Ref
  Women 1.30 (1.22, 1.38) 1.28 (1.21, 1.35)
  Aarhus 1.22 (1.10, 1.36) 1.50 (1.35, 1.66)
  Bergen 1.29 (1.16, 1.44) 1.44 (1.30, 1.60)
  Gothenburg 1.52 (1.35, 1.70) 1.37 (1.22, 1.52)
  Reykjavik Ref 1.47 (1.31, 1.64)
  Tartu 1.14 (1.01, 1.28) Ref
  Umea 1.93 (1.72, 2.17) 1.42 (1.28, 1.58)
  Uppsala 2.14 (1.90, 2.41) 1.65 (1.48, 1.83)
Italian 20-25 yrs Ref Ref
ECRHS 25-30 yrs 0.91 (0.77, 1.07) 0.96 (0.76, 1.22)
  30-35 yrs 1.07 (0.90, 1.27) 1.27 (1.00, 1.63)
  35-40 yrs 1.29 (1.08, 1.54) 1.50 (1.17, 1.92)
  40-44 yrs 1.50 (1.26, 1.80) 1.63 (1.26, 2.09)
  Men Ref Ref
  Women 1.18 (1.06, 1.31) 1.29 (1.11, 1.50)
  Verona 1.33 (1.19, 1.49) -
  Pavia 4.48 (3.62, 5.55) -
  Turin Ref -
ISAYA 20-25 yrs Ref -
  25-30 yrs 1.08 (0.89, 1.32) -
  30-35 yrs 1.19 (0.97, 1.45) -
  35-40 yrs 1.29 (1.05, 1.60) -
  40-44 yrs 1.19 (0.96, 1.47) -
  Men Ref -
  Women 1.42 (1.25, 1.61) -
  Verona 2.93 (2.59, 3.33) -
  Sassari Ref -