Fig. 4: Changes in measured pollutant concentrations following the intervention. | Journal of Exposure Science & Environmental Epidemiology

Fig. 4: Changes in measured pollutant concentrations following the intervention.

From: Measured air quality impacts after teaching parents about cooking ventilation with a video: a pilot study

Fig. 4

A–E Changes in NO2 concentrations, F–I Changes in PM2.5 concentrations. A and F illustrate changes in the mean event peak during cooking events for NO2 (ppb, panel A, p = 0.059) and for PM2.5 (µg/m3, panel F, p = 0.21); B and G illustrate changes in the mean event integrated concentration during cooking events for NO2 (ppb*min, panel B, p < 0.05) and for PM2.5 (µg/m3*min, panel G, p = 0.12); C and H illustrate changes in the mean event integrated concentration normalized to time for NO2 ((ppb*min)/burner-min, panel C, p = 0.11) and for PM2.5 ((µg/m3*min)/burner-min, panel H, p = 0.11); D and I illustrate changes in the total integrated concentration during cooking events for NO2 (ppb*min, panel D, p < 0.05) and for PM2.5 (µg/m3*min, panel I, p = 0.05); and E illustrates the mean NO2 concentration time-integrated over the entire observation window (not only cooking events) and measured on a passive sampler (ppb, p < 0.005). All p values are from Wilcoxon signed rank tests.

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