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Table 4 Sickness absence days 2016–2018 associated with attendance frequency in a negative binomial regression analysis model

From: Frequent attenders of three outpatient health care schemes in Finland: characteristics and association with long-term sickness absences, 2016–2018

  All outpatient health care Public OHS Private
non-A non-FA FA non-A non-FA FA non-A non-FA FA non-A non-FA FA
All − cause SA
 IRR (CI 95%. unadj.) 1.00 2.78 (2.57–3.01) 17.24 (15.17–19.61) 1.00 2.82 (2.65–3.00) 13.01 (11.89–14.98) 1.00 0.76 (0.72–0.81) 4.07 (3.50–4.74) 1.00 1.30 (1.21–1.40) 2.72 (2.16–3.43)
 IRR (CI 95%. adj.)a 1.00 2.57 (2.38–2.79) 14.80 (13.01–16.84) 1.00 2.45 (2.30–2.60) 10.72 (9.30–12.35) 1.00 1.02 (0.96–1.10) 4.68 (4.02–5.44) 1.00 1.38 (1.28–1.48) 3.20 (2.55–4.01)
 Predicted means (CI 95%. unadj.) 4.18 11.63 72.05 6.06 17.08 78.84 14.53 11.09 59.18 13.62 17.71 37.10
 Predicted means (CI 95%. adj.) a 3.84 9.89 56.87 5.74 14.05 61.57 10.47 10.73 49.00 10.9 15.01 34.84
Mental SA
 IRR (CI 95%. unadj.) 1.00 1.77 (1.50–2.09) 15.06 (11.47–19.78) 1.00 2.23 (1.96–2.54) 18.57 (13.78–25.02) 1.00 0.41 (0.36–0.46) 2.52 (1.83–3.46) 1.00 1.17 (1.00–1.37) 2.81 (1.72–4.59)
 IRR (CI 95%. adj.) a 1.00 2.10 (1.79–2.52) 17.18 (13.05–22.62) 1.00 1.96 (1.72–2.24) 13.40 (9.92–18.10) 1.00 0.64 (0.55–0.75) 4.07 (2.94–5.65) 1.00 1.31 (1.12–1.53) 3.53 (2.18–5.72)
 Predicted means (CI 95%. unadj.) 1.69 2.99 25.48 1.83 4.08 33.92 5.62 2.28 14.16 4.2 4.92 11.80
 Predicted means (CI 95%. adj.) a 1.21 2.57 20.78 1.81 3.55 24.21 3.76 2.41 15.32 3.28 4.31 11.62
Musculoskeletal SA
 IRR (CI 95%. unadj.) 1.00 5.04 (4.33–5.87) 30.61 (23.94–39.15) 1.00 3.31 (2.94–3.73) 9.88 (7.52–12.99) 1.00 1.00 (0.89–1.13) 6.97 (5.22–9.29) 1.00 1.50 (1.31–1.73) 2.79 (1.79–4.35)
 IRR (CI 95%. adj.) a 1.00 4.12 (3.55–4.78) 24.13 (18.97–30.70) 1.00 2.92 (2.59–3.28) 8.59 (6.55–11.27) 1.00 1.46 (1.28–1.65) 8.68 (6.56–11.48) 1.00 1.50 (1.31–1.72) 3.50 (2.29–5.35)
 Predicted means (CI 95%. unadj.) 0.73 3.66 22.20 1.79 5.72 17.67 3.61 3.61 25.13 3.98 6.00 11.10
 Predicted means (CI 95%. adj.) a 0.59 2.45 14.35 1.33 3.87 11.40 1.97 2.86 17.02 2.58 3.87 9.03
Other diagnosis SA
 IRR (CI 95%. unadj.) 1.00 2.83 (2.55–3.14) 13.84 (11.67–16.41) 1.00 2.89 (2.67–3.14) 11.14 (9.24–13.42) 1.00 0.98 (0.90–1.07) 3.75 (3.07–4.58) 1.00 1.25 (1.13–1.38) 2.61 (1.92–3.54)
 IRR (CI 95%. adj.) a 1.00 2.68 (2.42–2.98) 11.46 (9.65–13.61) 1.00 2.69 (2.47–2.92) 9.45 (7.83–11.41) 1.00 1.21 (1.10–1.32) 3.67 (3.01–4.48) 1.00 1.34 (1.22–1.48) 3.15 (2.33–4.24)
 Predicted means (CI 95%. unadj.) 1.76 4.98 24.37 2.45 7.07 27.25 5.30 5.20 19.89 5.44 6.78 14.19
 Predicted means (CI 95%. adj.) a 1.62 4.34 18.51 2.23 6.00 21.12 4.05 4.88 14.87 4.38 5.87 13.77
  1. non-A non-attenders, non-FA non-frequent attenders, FA frequent attenders
  2. a Adjusted for sex, age group, marital status, occupational class, educational level, and chronic disease