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Table 3 Logistic regression models for prediction of the Maintenance Care (MC) -recommendation

From: The Nordic maintenance care program: the clinical use of identified indications for preventive care

  Ordinary (one level1) Logistic regression Multi-level (two levels1) Logistic regression
Factors OR 95% CI p-value OR 95% CI p-value
Many previous episodes 3.5 1.6 – 7.7 0.002 4.1 1.5 – 10.7 0.005
Long duration 1.4 0.7 – 2.8 0.39 1.5 0.6 – 3.6 0.35
Definitely better by the 4th visit 1.4 0.7 – 3.0 0.33 1.2 0.5 – 3.0 0.62
Akaike’s Index (AIC)2 244.69 225.41
  1. 1 The levels are patients (n = 252) for the one-level model and patients (n = 252) and chiropractors (n = 33) for the two-level model. 2 A smaller value for AIC indicates better fit to data.