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Table 5 Different cut-offs of climatic factors to stratify data

From: Climatic modification effects on the association between PM1 and lung cancer incidence in China

 

Air temperature

 

Relative humidity

Mean male incidence rate = 50.16

Mean male incidence rate = 50.16

β

95% CI

β

95% CI

PM1

7.18% ***

(2.79%, 11.36%)

PM1

4.71% **

(−0.05%, 9.48%)

Longitude

0.53 ***

(0.27, 0.78)

Longitude

0.36 ***

(0.09, 0.64)

Latitude

0.49 **

(0.05, 0.92)

Latitude

1.57 ***

(0.77, 2.37)

Year 2015

3.73 **

(0.39, 7.06)

Year 2015

0.97

(−2.88, 4.82)

Relative humidity

0.03

(−0.19, 0.26)

Air temperature

1.86 ***

(1.01, 2.71)

Finance

0.05

(−0.02, 0.11)

Finance

0.04

(−0.02, 0.11)

Education

−2.18 **

(−4.37, 0.01)

Education

−2.16 **

(−4.35, 0.02)

Employment

−0.21 *

(−0.45, 0.03)

Employment

−0.26 **

(−0.51, − 0.02)

Construction

0.03

(−0.04, 0.09)

Construction

0.01

(−0.06, 0.08)

Manufacturing

−0.04 ***

(−0.07, − 0.01)

Manufacturing

−0.04 ***

(−0.06, − 0.01)

Population

0.01

(−0.04, 0.05)

Population

0.00

(−0.05, 0.05)

Urban-rural

2.34

(−1.84, 6.52)

Urban-rural

3.43 *

(−0.73, 7.60)

PM1 × Temperature2

3.59% ***

(1.79%, 5.58%)

PM1 × Humidity2

1.50% *

(−0.32%, 3.33%)

PM1 × Temperature3

6.98% ***

(4.39%, 9.57%)

PM1 × Humidity3

3.75% ***

(1.52%, 5.99%)

  1. * for p < 0.1, ** for p < 0.05 and *** for p < 0.01. If PM1 changes by 10 μg/m3, the change in incidence rate relative to its mean = (10 × coefficient for PM1 or its interaction terms)/mean incidence rate