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Fig. 2 | Respiratory Research

Fig. 2

From: Short-term exposure to PM2.5 and vanadium and changes in asthma gene DNA methylation and lung function decrements among urban children

Fig. 2

Schematic demonstration of study data. Numbers in the box represent the number of participants. N:n = number of repeat subjects: number of observations. Grey dotted box indicates two measures (both Time 1 and Time 2, 6 months apart) available and white box only one measure (Time 1) available. N = 14 participants dropped due to invalid residential air pollution data, resulting in n = 234 (54 + 85 × 2 + 10) data points available. N = 3 participants (equivalent to n = 5 observations as two participants with repeat measure had one invalid data) were excluded from the analysis of DNA methylation due to technical failures in the laboratory and N = 5 more participants (equivalent to n = 14 observations) were removed due to invalid pulmonary function tests

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Respiratory Research

ISSN: 1465-993X

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