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Table 4 Odds ratios (with 95% CI) of hospital visits for pneumonia associated with atmospheric pollutants

From: Ambient air pollutants and hospital visits for pneumonia: a case-crossover study in Qingdao, China

Air pollutants

OR (95%CI)

lag0

lag1

lag2

lag3

lag4

lag5

lag6

PM2.5

1.015

1.048*

1.064**

1.008

1.028

1.059**

1.026

(0.974,1.056)

(1.007,1.091)

(1.023,1.107)

(0.968,1.050)

(0.989,1.069)

(1.019,1.102)

(0.985,1.068)

PM10

1.029

1.052*

1.077***

1.018

1.04

1.046*

1.005

(0.986,1.074)

(1.008,1.098)

(1.032,1.124)

(0.975,1.063)

(0.997,1.085)

(1.002,1.091)

(0.961,1.050)

SO2

0.991

1.045

1.072*

1.01

1.002

1.008

1.016

(0.934,1.051)

(0.985,1.109)

(1.011,1.135)

(0.953,1.071)

(0.945,1.062)

(0.950,1.069)

(0.958,1.077)

NO2

1.005

1.047

1.067**

1.027

1.018

1.007

1.018

(0.950,1.064)

(0.990,1.107)

(1.010,1.127)

(0.971,1.085)

(0.963,1.076)

(0.953,1.065)

(0.962,1.078)

CO

1.004

1.014

1.03

1.007

1.015

1.032

1.025

(0.966,1.043)

(0.979,1.051)

(0.994,1.066)

(0.972,1.043)

(0.982,1.049)

(0.999,1.066)

(0.990,1.062)

  1. Note: All conditional logistic models were adjusted for temperature, relative humidity, and atmospheric pressure. The concentration of each pollutant increases in interquartile intervals
  2. Lag represents the days before the hospital visits. lag0 represents the day of the hospital visits; Lag1 represents one day before hospital visits; the others so on
  3. *P < 0.05; ** P < 0.01; *** P < 0.001
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BMC Public Health

ISSN: 1471-2458

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