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Table 1 Results of negative−binomial regression models

From: Cumulative disadvantage? Exploring relationships between neighbourhood deprivation trends (1991 to 2006) and mortality in New Zealand

   All−cause mortality   CVD−related mortality
  (age−adjusted model)   (age−adjusted model)
IRR (95% CI) Z−statistic IRR (95% CI) Z−statistic
Trends of relative deprivation       
L − persistently lowest NZDep 0.75 (0.67−0.84)*** −5.19 0.80 (0.68−0.94)** −2.71
K − persistently low NZDep 0.92 (0.84−1.00) −1.85 0.99 (0.87−1.12) −0.15
J − persistently fairly low NZDep 0.81 (0.75−0.87)*** −5.87 0.82 (0.74−0.92)*** −3.57
I − increase, lower NZDep 0.96 (0.89−1.04) −0.98 1.05 (0.94−1.17) 0.82
H − decline, lower NZDep 0.87 (0.80−0.95)*** −3.19 0.86 (0.75−0.98)** −2.29
G − persistently moderate NZDep Ref    Ref   
F − decline, moderate NZDep 1.09 (0.95−1.24) 1.18 1.13 (0.92−1.39) 1.16
E − very slight fluctuations, moderate NZDep 1.17 (1.10−1.25)*** 4.69 1.18 (1.07−1.30)*** 3.28
D − persistently , moderately high NZDep 1.26 (1.18−1.34)*** 6.93 1.24 (1.12−1.36)*** 4.31
C − persistently fairly high NZDep 1.34 (1.25−1.44)*** 8.44 1.30 (1.17−1.44)*** 5.00
B− persistently high NZDep 1.51 (1.40−1.63)*** 10.75 1.43 (1.27−1.61)*** 6.06
A − persistently highest NZDep 1.68 (1.54−1.85)*** 11.09 1.68 (1.46−1.94)*** 7.08
Log likelihood   −9867.45    −5150.66  
AIC   19768.9    10335.32  
LR Chi2   1315.15    433.78  
Prob > chi2   <0.000    <0.000  
Deciles of deprivation index in 2006       
1. Lowest deprivation 0.78 (0.72−0.84)*** −6.14 0.79 (0.70−0.89)*** −3.79
2 0.89 (0.82−0.96)** −3.08 0.91 (0.81−1.02) −1.68
3 0.85 (0.78−0.92)*** −4.05 0.85 (0.76−0.96)** −2.59
4 0.94 (0.87−1.01) −1.67 0.96 (0.86−1.08) −0.63
5 Ref    Ref   
6 1.11 (1.03−1.19)** 2.61 1.08 (0.97−1.21) 1.38
7 1.21 (1.12−1.30)*** 4.99 1.16 (1.04−1.29)** 2.60
8 1.31 (1.22−1.41)*** 7.45 1.29 (1.16−1.43)*** 4.68
9 1.37 (1.27−1.47)*** 8.36 1.31 (1.17−1.46)*** 4.76
10. Highest deprivation 1.59 (1.47−1.71)*** 12.18 1.53 (1.36−1.71)*** 7.24
Log likelihood   −9861.44    −5147.90  
AIC   19752.89    10325.79  
LR Chi2   1312.61    438.01  
Prob > chi2   <0.000    <0.000  
  1. * p < 0.05; ** p < 0.01; *** p < 0.001.
  2. NOTE: Z−statistic = coefficient/standard error. The value follows a standard normal distribution which is used to test against a two−sided alternative hypothesis that the coefficient is not equal to zero.