Table 2.

Predictors of duration of cough until a slight problem or less.

	β (95% CI)	Adjusted βa (95% CI)	P-value
Clinical assessment
Prior duration, days	0.10 (0.04 to 0.17)	0.11 (0.03 to 0.18)	0.004b
History of fever	−0.60 (−0.36 to −1.56)	−1.22 (−0.18 to −2.27)	0.022
Green-coloured sputum	−0.19 (−1.11 to 0.73)	−0.79 (−1.79 to 0.21)	0.119
Sore throat	0.61 (−0.38 to 1.59)	0.21 (−0.86 to 1.27)	0.702
Runny nose	−1.43 (−0.43 to −2.42)	−1.35 (−0.31 to −2.39)	0.011
Prolonged expiration	3.08 (0.22 to 5.94)	1.06 (4.23 to −2.11)	0.512
Respiration rate, ≥20/min	−0.06 (−1.14 to 1.02)	0.04 (−0.06 to 0.15)	0.415
Temperature, ≥37.0°C	−1.15 (−2.15 to −0.15)	−1.05 (0.03 to −2.12)	0.056
Coarse crepitations	0.58 (−0.72 to 1.89)	0.09 (−1.28 to 1.45)	0.901
Wheeze	0.69 (−0.71 to 2.08)	0.17 (−1.32 to 1.70)	0.807
Fine crepitations	−0.56 (−3.41 to 2.29)	0.02 (−2.94 to 2.97)	0.991
Smoker	−0.03 (−1.31 to 1.26)	−0.19 (−1.62 to 1.24)	0.795
Age
Older age, ≥60 years	−0.99 (−3.08 to 0.22)	−0.94 (−2.22 to 0.34)	0.149
Children, <16 years	−1.87 (−3.08 to −0.65)	−1.72 (−3.02 to −0.41)	0.010b
Symptoms on day 1
Cough	0.62 (0.19 to 1.06)	0.36 (−0.12 to 0.84)	0.137
Sputum	0.34 (0.02 to 0.67)	0.14 (−0.20 to 0.49)	0.42
Short of breath	0.22 (−0.10 to 0.55)	−0.03 (−0.39 to 0.32)	0.851
Sleep	0.28 (−0.02 to 0.58)	0.00 (−0.34 to 0.35)	0.986
Restriction of activities	0.57 (0.25 to 0.89)	0.69 (0.36 to 1.02)	<0.001b
Unwell	0.35 (0.01 to 0.69)	−0.03 (−0.53 to 0.47)	0.909

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

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

^bP-value is significant at ≤ 0.01.