Figure 1From: Passive smoking, as measured by hair nicotine, and severity of acute lower respiratory illnesses among children Box Plot of nicotine hair levels according to ALRI severity categorisation. Whiskers are the range of values (excluding outliers), Boxes are 25%–75% percentiles, dash in the box is the median, Y axis is the log of hair nicotine values for children, X axis is the 5 severity levels (level 1 is least severe and level 5 is the most severe).Back to article page