Table 4

Predictors of symptom severity for days 2–4 after seeing the doctor.

β (95% CI)Adjusted βa (95% CI)P-value
Clinical assessment
 Prior duration, days0.00 (−0.01 to 0.01)0.00 (−0.005 to 0.01)0.34
 History of fever0.44 (0.26 to 0.62)0.06 (−0.08 to 0.19)0.42
 Green–coloured sputum0.12 (−0.06 to 0.29)−0.04 (−0.17 to 0.10)0.34
 Sore throat0.11 (−0.08 to 0.30)0.01 (−0.13 to 0.15)0.86
 Runny nose0.06 (−0.12 to 0.25)−0.06 (−0.19 to 0.08)0.43
 Prolonged expiration0.31 (−0.21 to 0.84)0.04 (−0.39 to 0.46)0.87
 Respiration rate, ≥20/min0.07 (−0.14 to 0.27)−0.04 (−0.20 to 0.11)0.60
 Temperature, ≥37.0°C−0.06 (−0.25 to 0.13)−0.07 (−0.21 to 0.07)0.33
 Coarse crepitations0.09 (−0.16 to 0.33)0.02 (−0.16 to 0.20)0.83
 Wheeze0.18 (−0.09 to 0.44)−0.04 (−0.23 to 0.16)0.70
 Fine crepitations−0.04 (−0.57 to 0.49)0.16 (−0.22 to 0.54)0.42
 Smoker0.33 (0.10 to 0.56)0.02 (−0.16 to 0.20)0.80
Age
 Older age, ≥60 years−0.53 (−0.31 to 0.75)−0.17 (−0.01 to −0.34)0.043
 Children, <16 years−0.58 (−0.35 to −0.80)−0.23 (−0.06; to −0.41)0.008b
Symptoms on day 1
 Cough0.36 (0.29 to 0.43)0.03 (−0.03 to 0.10)0.33
 Sputum0.30 (0.25 to 0.35)0.15 (0.10 to 0.19)<0.001b
 Short of breath0.31 (0.25 to 0.36)0.12 (0.07 to 0.17)<0.001b
 Sleep0.28 (0.24 to 0.33)0.11 (0.07 to 0.16)<0.001b
 Restriction of activities0.40 (0.35 to 0.45)0.17 (0.11 to 0.24)<0.001b
 Unwell0.40 (0.34 to 0.45)0.10 (0.03 to 0.17)0.003b
  • 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.