However , duration of cough [ median ( IQR ) 1.0 ( 0.0-6 .0 ) vs 6.0 ( 0.0-13 .3 ) days ] , rhinorrhoea [ median ( IQR ) 2.0 ( 0.0-7 .0 ) vs 5.5 ( 1.0-15 .3 ) days ] and the frequency of having two or more symptoms of the common cold [ median ( IQR ) 0.0 ( 0.0-1 .0 ) vs 1.0 ( 0.0-5 .3 ) days ] were reduced significantly in the intervention group ( P < 0.01 ) .
