Skip to main content

Table 2 Estimated regression coefficients: original expert model (Approach 1) compared to Approaches 4 and 5

From: Validating and updating a risk model for pneumonia – a case study

Variable Approach 1 Approach 4 Approach 5
Expert model Random g Maximum likelihood
Intercept −79.19 −37.50 −36.31
Age −0.0054 −0.0017 −0.0079
Duration of new/worsened cough 0.15 0.027 0.033
Maximum temperature 1.89 0.39 0.37
Dyspnea −1.34 0.51 0.59
Dyspnea at effort only 2.63 −0.078 −0.11
Rigors 0.52 −0.14 −0.017
Number of cigarettes / day 0.023 0.017 0.0054
Current temperature 0.14 0.54 0.53
Signs of upper respiratory infection 1.23 −0.43 −0.61
Prolonged expiration −1.40 0.12 0.16
Percussion dullness 0.84 1.44 1.60
Auscultation friction rub 0.97 1.39 1.41
Auscultation diminished insp. sound 0.41 0.69 0.44
Auscultation abnormality breath sound 0.52 0.66 0.73
(Age – 45)2 0.00017 0.00050 0.00058
(Duration of cough – 10)2 −0.00912 −0.0010 −0.00083
(Maximum temperature – 38.5)2 −0.83 0.057 0.046
(Current temperature – 38.5)2 −0.33 0.033 0.072