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Table 4 Percentage change with 95% CI in cardiac arrhythmia admissions associated with an IQR increases in PM2.5 (47.5 μg/m3) and PM10 (76.9 μg/m3) concentration for different lag structure

From: The effect of ambient particle matters on hospital admissions for cardiac arrhythmia: a multi-city case-crossover study in China

Lag Days

PM2.5

PM10

Percentage Change

95% CI

p value

Percentage Change

95% CI

p value

Lag 0 days

1.50

0.98–2.02

< 0.001

1.56

0.92–2.19

< 0.001

Lag 1 days

1.89

1.37–2.40

< 0.001

1.91

1.27–2.55

< 0.001

Lag 2 days

2.09

1.58–2.60

< 0.001

2.33

1.68–2.97

< 0.001

Lag 3 days

1.48

0.97–2.00

< 0.001

2.15

1.52–2.79

< 0.001

Lag 4 days

0.00

−0.52 - 0.52

0.997

0.65

0.02–1.28

0.043

Lag 5 days

−0.36

−0.88 - 0.16

0.177

−0.10

−0.73 - 0.54

0.767

Lag 0–2 days

2.67

2.03–3.31

< 0.001

2.92

2.11–3.74

< 0.001

Lag 0–3 days

2.93

2.24–3.63

< 0.001

3.56

2.67–4.46

< 0.001

Lag 0–4 days

2.67

1.91–3.43

< 0.001

3.58

2.61–4.56

< 0.001

Lag 0–5 days

2.28

1.47–3.09

< 0.001

3.22

2.19–4.26

< 0.001

  1. CI confidence interval, IQR interquartile range. The association was adjusted for temperature, relative humidity, public holidays and city-level confounders