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Table 2 Conditional Poisson regression models for suicide counts among four Colombian cities, 2011–2014

From: Association between air pollution and suicide: a time series analysis in four Colombian cities

Pollutant

Crude Estimations

Adjusted Estimationsa

 

IRR

95% CI

p

IRR

95% CI

p

Models for total number of suicides

 NO2

0.82

0.80

0.85

< 0.01

0.99

0.95

1.04

0.81

 SO2

1.00

0.99

1.01

0.52

0.99

0.98

1.01

0.31

 PM10

0.96

0.93

0.99

< 0.01

0.99

0.95

1.03

0.64

 PM2.5

0.95

0.92

0.98

< 0.01

1.01

0.98

1.05

0.47

 COmax

0.99

0.99

0.99

< 0.01

1.00

1.00

1.00

0.81

 O3

1.00

0.98

1.03

0.851

1.00

0.96

1.04

0.93

Models for suicides among men

 NO2

0.82

0.80

0.85

< 0.01

0.99

0.94

1.04

0.69

 SO2

1.00

1.00

1.01

0.34

0.99

0.98

1.01

0.35

 PM10

0.96

0.93

0.99

0.02

1.00

0.95

1.04

0.86

 PM2.5

0.95

0.92

0.98

< 0.01

1.00

0.97

1.04

0.80

 COmax

0.99

0.98

0.99

< 0.01

1.00

1.00

1.00

0.69

 O3

1.01

0.98

1.03

0.65

1.00

0.96

1.04

0.93

Models for suicides among women

 NO2

0.82

0.76

0.88

< 0.01

1.01

0.92

1.12

0.77

 SO2

0.99

0.97

1.02

0.64

0.99

0.96

1.03

0.69

 PM10

0.95

0.88

1.02

0.18

0.97

0.88

1.06

0.47

 PM2.5

0.94

0.88

1.01

0.08

1.00

0.93

1.09

0.92

 COmax

0.99

0.98

0.99

< 0.01

1.00

0.99

1.01

0.77

 O3

0.99

0.93

1.04

0.62

1.00

0.91

1.09

0.93

  1. For each pollutant the IRR are mean changes in the rates per increase in this 20% of the average (6 μg/m3 for NO2, 2 μg/m3 for SO2, 0.4 μg/m3 for CO and 10 μg/m3 for O3). For PM10 and PM2.5, the values were centered by convention on 10 and 5 μg/m3, respectively
  2. IRR incidence rate ratio, CI confidence interval
  3. aEstimates are adjusted for temperature, precipitation, humidity and holidays