Figure 2
From: Compromised Air Quality and Healthcare Safety from Smoking inside Hospitals in Shantou, China
Mobile air surveys showing the overall PM2.5 concentrations (A) outside and inside the hospital buildings (outside the clinical wards) in five hospitals and (B) outside the hospital buildings in comparison with six different locations inside the hospital buildings (outside the clinical wards) of five hospitals, with the no. of records of PM2.5 measurement (n). Boxplot shows interquartile range, IQR (box) and median (horizontal bar in box) with outliers (1.5–3.0 × IQR above Q3, solid circles) and extreme values (>3.0 × IQR above Q3, stars). CN-AQS, the China air quality standard; WHO-AQG, the WHO air quality guideline.
