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Table 2 Incidence rate ratios for suicide and 95% confidence intervals by sex for all ages and 3 age groups

From: Suicide epidemics: the impact of newly emerging methods on overall suicide rates - a time trends study

   

Incidence rate ratios (95% CI)

   

Coal gas England and Wales (1919-1935)

Car exhaust gas England and Wales (1975-1992)

Barbecue charcoal gas Taiwan (1999-2006)

ALL AGES

     
 

Males

    
  

All suicides

1.017 (1.015-1.019)

1.012 (1.010-1.014)

1.075 (1.069-1.082)

  

Non gassing

0.997 (0.995-0.999)

0.993 (0.991-0.995)

1.019 (1.012-1.025)

  

Gassing only

1.106 (1.101-1.110)

1.072 (1.068-1.076)

1.401 (1.379-1.423)

 

Females

    
  

All suicides

1.032 (1.029-1.034)

0.959 (0.957-0.962)

1.053 (1.044-1.062)

  

Non gassing

1.005 (1.002-1.008)

0.952 (0.950-0.955)

1.011 (1.001-1.020)

  

Gassing only

1.108 (1.102-1.114)

1.071 (1.061-1.083)

1.469 (1.426-1.513)

15-44 years

     
 

Males

    
  

All suicides

1.014 (1.011-1.017)

1.032 (1.029-1.034)

1.100 (1.091-1.110)

  

Non gassing

0.992 (0.989-0.995)

1.012 (1.009-1.015)

1.017 (1.007-1.027)

  

Gassing only

1.105 (1.097-1.112)

1.079 (1.074-1.084)

1.434 (1.406-1.463)

 

Females

    
  

All suicides

1.030 (1.026-1.034)

0.972 (0.967-0.976)

1.070 (1.057-1.084)

  

Non gassing

1.006 (1.002-1.011)

0.959 (0.954-0.963)

0.997 (0.982-1.011)

  

Gassing only

1.108 (1.099-1.118)

1.087 (1.072-1.103)

1.461 (1.413-1.511)

45-64 years

     
 

Males

    
  

All suicides

1.018 (1.015-1.020)

0.998 (0.995-1.001)

1.060 (1.049-1.072)

  

Non gassing

0.998 (0.996-1.001)

0.978 (0.975-0.982)

1.016 (1.005-1.028)

  

Gassing only

1.101 (1.095-1.108)

1.063 (1.056-1.070)

1.399 (1.355-1.445)

 

Females

    
  

All suicides

1.026 (1.022-1.030)

0.957 (0.954-0.961)

1.034 (1.018-1.051)

  

Non gassing

0.998 (0.993-1.003)

0.951 (0.947-0.955)

0.997 (0.980-1.013)

  

Gassing only

1.099 (1.090-1.107)

1.060 (1.042-1.077)

1.544 (1.446-1.648)

65+ years

     
 

Males

    
  

All suicides

1.010 (1.006-1.014)

0.989 (0.985-0.993)

1.020 (1.007-1.033)

  

Non gassing

0.991 (0.986-0.995)

0.980 (0.976-0.984)

1.013 (1.000-1.026)

  

Gassing only

1.109 (1.097-1.121

1.065 (1.052-1.078)

1.536 (1.369-1.723)

 

Females

    
  

All suicides

1.035 (1.026-1.043)

0.951 (0.947-0.955)

1.014 (0.997-1.032)

  

Non gassing

1.006(0.997-1.015)

0.950 (0.945-0.954)

1.012 (0.995-1.029)

  

Gassing only

1.114 (1.097-1.133)

1.059 (1.022-1.098)

1.415 (1.109-1.804)