Table 4 Association between exposure to at least one air quality threshold exceedance of pollution and the occurrence of secondary pneumothorax.

From: Short term association between air pollution (PM10, NO2 and O3) and secondary spontaneous pneumothorax

Variables

OR (95% CI)*

P value†

Pcor value‡

PM10 (daily average 50 µg/m3)

Lag 1

0.41 (0.11–1.49)

0.17

1.00

Lag 2

0.54 (0.15–1.90)

0.34

1.00

Lag 3

1.00 (0.35–2.88)

1.00

1.00

Lag 4

0.96 (0.34–2.73)

0.94

1.00

Entire exposure period¥

0.82 (0.38–1.78)

0.62

1.00

O3 (8-h average 120 µg/m3)

Lag 1

1.69 (0.71–4.02)

0.23

0.68

Lag 2

1.77 (0.63–4.95)

0.28

0.68

Lag 3

1.72 (0.58–5.08)

0.33

0.68

Lag 4

0.91 (0.29–2.81)

0.87

0.87

Entire exposure period

1.36 (0.66–2.79)

0.40

0.68

  1. CI confidence interval.
  2. *Confidence interval without correction for multiple comparison procedure.
  3. For conditional logistic regression.
  4. Corrected P value with Benjamini Yekutieli’s method.
  5. ¥Entire exposure period = Lag 1 to date Lag 4.