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Table 4 The effect of age group and visiting year on the visit and examination intervals

From: Frequency of visits and examinations in the Public Dental Service in Finland – a retrospective analysis, 2001–2013

  Random effects, visit interval Fixed effects, visit interval Random effects, exam interval Fixed effects, exam interval
  n/observations B(95% CI) n/observations B(95% CI) n/observations B(95% CI) n/observations B(95% CI)
All age groups 190,811/657200 190,811/657200 128,329/337242 128,329/337242
< 18 years ref   ref  
18–64 years 0.13(0.13–0.14)   0.50(0.49–0.51)  
65+ years −0.03(−0.04−−0.03)   0.16(0.15–0.18)  
Visiting year (per 5 years) 0.02(0.01–0.02) 0.01(0.00–0.01) 0.13(0.12–0.13) 0.20(0.19–0.21)
Only < 18 years 78,560/289819 78,560/289819 72,812/214232 72,812/214232
Visiting year (per 5 years) 0.02(0.02–0.03) -0.03(−0.04--0.03) 0.16(0.15–0.16) 0.19(0.19–0.20)
Only 18–64 years 109,527/307174 109,527/307174 55,607/103482 55,607/103482
Visiting year (per 5 years) −0.02(−0.02--0.01) 0.01(0.01–0.02) 0.07(0.06–0.08) 0.15(0.13–0.16)
Only 65+ years 20,691/60207 20,691/60207 10,001/19528 10,001/19528
Visiting year (per 5 years) 0.05(0.03–0.06) 0.05(0.04–0.07) 0.07(0.05–0.10) 0.20(0.16–0.24)
  1. Patients with at least two visits or examinations included. Second visit in 2005 or later. Only observations with an interval of 4 or less years included
  2. Visiting year is a continuous and age group a categorical predictor
  3. All coefficients significant at p < 0.01 level
  4. B = change in years per one unit change in the predictor