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. 2008 Feb 1;58(547):88–92. doi: 10.3399/bjgp08X264045

Table 3.

Predictors of duration of moderately bad symptoms.

β (95% CI) Adjusted βa (95% CI) P-value
Clinical assessment
 Prior duration, days 0.07 (0.01 to 0.13) 0.10 (0.04 to 0.15) 0.001b
 History of fever 0.51 (−0.34 to 1.36) −0.03 (−0.86 to 0.80) 0.95
 Green-coloured sputum 0.26 (−0.56 to 1.07) 0.16 (−0.61 to 0.94) 0.68
 Sore throat −0.03 (−0.91 to 0.84) −0.14 (−0.97 to 0.69) 0.74
 Runny nose −0.55 (−1.42 to 0.33) −0.61 (−1.42 to 0.20) 0.14
 Prolonged expiration 1.32 (−1.41 to 4.05) 0.73 (−1.79 to 3.25) 0.57
 Respiration rate, ≥20/min −0..08 (−1.05 to 0.88) 0.02 (−1.05 to 0.26) 0.97
 Temperature, ≥37.0°C −0.68 (−1.55 to 0.20) −0.86 (−1.68 to −0.04) 0.04
 Coarse crepitations −0.03 (−1.17 to 1.10) −0.02 (−1.09 to −1.04) 0.96
 Wheeze −0.07 (−1.32 to 1.17) −0.14 (−1.31 to 1.03) 0.82
 Fine crepitations −0.87 (−3.32 to 1.58) −0.18 (−2.51 to 2.16) 0.88
 Smoker −0.13 (−1.29 to 1.04) −0.08 (−1.19 to 1.02) 0.88

Age
 Older age, ≥60 years −1.52 (−2.59 to 0.45) −0.81 (−1.83 to 0.20) 0.12
 Children, <16 years −0.72 (−1.82 to 0.37) −0.20 (−1.25 to 0.85) 0.71

Symptoms on day 1
 Cough 1.04 (0.69 to 1.39) 0.68 (0.30 to 1.05) <0.001b
 Sputum 0.58 (0.32 to 0.85) 0.21 (−0.07 to 0.48) 0.14
 Short of breath 0.52 (0.25 to 0.78) 0.06 (−0.23 to 0.34) 0.69
 Sleep 0.63 (0.38 to 0.89) 0.11 (−0.17 to 0.40) 0.43
 Restriction of activities 0.91 (0.65 to 1.17) 0.82 (0.54 to 1.11) <0.001b
 Unwell 0.89 (0.61 to 1.16) 0.21 (−0.20 to 0.63) 0.31

The β estimates are the estimate of the number of days' difference in duration attributable to each variable.

a

The estimates for each variable controls for the effects of the other variables and the randomised interventions.

b

P-value is significant at ≤0.01.