Table 2

 Incident rate ratios (and 95% CI) from the Poisson or negative binomial models of suicide in males resident in the North West Government Office Region at the local authority level

Explanatory variablesQuartile 1Quartile 2Quartile 3Quartile 4Linear model
*The result of the likelihood ratio test justifies dropping these explanatory variables from the model.
Males, 10–29 years
    Income scale*10.95 (0.70 to 1.28)0.78 (0.49 to 1.24)0.99 (0.55 to 1.76)0.95 (0.81 to 1.10)
    Employment scale*11.06 (0.80 to 1.42)0.64 (0.37 to 1.10)1.05 (0.54 to 2.08)0.95 (0.80 to 1.12)
Males, 30–49 years
    Income scale*10.90 (0.73 to 1.13)0.74 (0.52 to 1.05)0.89 (0.58 to 1.40)0.92 (0.82 to 1.03)
    Employment scale*10.93 (0.75 to 1.16)0.70 (0.48 to 1.04)1.07 (0.66 to 1.73)0.94 (0.83 to 1.06)
Males, ⩾50 years
    Income scale*11.15 (0.94 to 1.41)0.94 (0.67 to 1.33)1.10 (0.72 to 1.65)1.03 (0.93 to 1.14)
    Employment scale*11.09 (0.88 to 1.33)0.99 (0.70 to 1.42)1.04 (0.63 to 1.73)1.02 (0.91 to 1.15)