The Treasury

Global Navigation

Personal tools

Treasury
Publication

The Cost of Ill Health WP 10/04

Appendix F

Appendix Table F1 – Mean and standard deviations of variables – linear regression models,
participating working age non-students, 2004/05
  Mean Standard deviation
Usual annual hours worked 1,941.984  864.878  
Gender (male=0, female=1) 0.482 0.500
Region (base=Auckland)    
Waikato (=1) 0.097 0.296
Wellington (=1) 0.127 0.333
Rest of North Island (=1) 0.229 0.420
Canterbury (=1) 0.157 0.364
Rest of South Island (=1) 0.111 0.314
Born in NZ (yes=1, no=0) 0.193 0.394
Ethnicity (base=NZ/European)    
Māori (=1) 0.103 0.304
Pacific Islander (=1) 0.043 0.203
Other (=1) 0.067 0.250
Age at interview date 40.878 12.244
Age 50 and over (15-49=0, 50 and over=1) 0.280 0.449
Highest qualification (base=school qualification)    
Post-school vocational qualification (=1) 0.396 0.489
Degree or higher (=1) 0.193 0.395
No qualification (=1) 0.154 0.361
Self-rated health (base=excellent)    
Very good 0.363 0.481
Good 0.189 0.392
Fair 0.041 0.197
Poor 0.001 0.082
Studying (no studying in reference period=0, studying in reference period=1) 0.130 0.336
Log other household income 8.519 4.039
Partner (base=working partner)    
Non-working partner (=1) 0.094 0.292
No partner (=1) 0.307 0.461
Children (base=no children)    
Child(ren) minimum age 0-<5 0.149 0.356
Child(ren) minimum age 5-17 0.272 0.445
Years paid employment 22.248 12.182
Unemployment rate 3.706 0.296
Number of observations 8,710

Source: SoFIE Wave 3 Version 4, adjusted longitudinal weights, Statistics New Zealand

Note: Based on original sample members who respond in Waves 1-3; who consent for their data to be linked to NZHIS information; are participating; and who are aged over 15 at the end of the reference period in Wave 1. Full-time students and those 65 years of age and over are excluded.

Appendix Table F2 – Estimated coefficients for hours worked – linear regression model – 2004/05
  Coefficient Standard error P value 95% confidence intervals
        Lower Upper
Self-rated health (base=excellent)          
Very good -21.360 20.581 0.299 -61.704 18.984
Good -122.732*** 26.014 0.000 -173.726 -71.737
Fair -270.494*** 49.993 0.000 -368.493 -172.495
Poor -454.700*** 117.337 0.000 -684.708 -224.692
Sex (base=male)          
Female -461.142*** 34.454 0.000 -528.679 -393.604
Region (base=Auckland)          
Waikato 121.550*** 38.333 0.002 46.409 196.692
Wellington -42.498 27.625 0.124 -96.650 11.654
Rest of North Island -20.080 28.919 0.487 -76.769 36.608
Canterbury 11.125 28.421 0.695 -44.586 66.836
Rest of South Island -11.067 29.920 0.711 -69.718 47.584
Born in New Zealand (base=yes)          
No -50.781* 26.857 0.059 -103.427 1.865
Ethnicity (base=NZ/European)          
Māori 33.602 33.424 0.315 -31.916 99.120
Pacific Islander 96.502* 49.355 0.051 -0.246 193.250
Other 12.389 49.029 0.801 -83.720 108.499
Age at interview date -27.484*** 2.586 0.000 -32.552 -22.415
Aged 50 and over (base=15-49) 812.546*** 311.955 0.009 201.040 1424.052
Highest qualification (base=school qualification)          
Post-school vocational qualification 25.696 23.770 0.280 -20.899 72.291
Degree or higher 207.806*** 28.731 0.000 151.487 264.126
No qualification -62.026** 29.783 0.037 -120.408 -3.643
Studying (base=no studying) -219.067*** 31.893 0.000 -281.585 -156.550
Log other household income -7.752*** 2.788 0.005 -13.217 -2.287
Partner (base=working partner)          
Non-working partner -113.556** 44.684 0.011 -201.146 -25.965
No partner -233.905*** 38.160 0.000 -308.708 -159.102
Children (base=no children)          
Child(ren) minimum age 0-<5 8.603 45.541 0.850 -80.669 97.874
Child(ren) minimum age 5-17 -12.768 34.861 0.714 -81.104 55.569
Years paid employment 49.120*** 5.146 0.000 39.032 59.208
Years paid employment squared -0.370*** 0.100 0.000 -0.565 -0.175
Unemployment rate -51.238* 30.803 0.096 -111.620 9.144
Interactions          
Female*Child(ren) minimum age 0-<5 -764.194*** 58.740 0.000 -879.338 -649.049
Female*Child(ren) minimum age 5-17 -237.885*** 46.749 0.000 -329.525 -146.246
Female*Non-working partner -28.078 93.140 0.763 -210.654 154.499
Female*No partner 219.626*** 44.718 0.000 131.968 307.283
Aged 50 and over*Age -16.029*** 6.077 0.008 -27.941 -4.117
Constant 2881.924*** 137.147 0.000 2613.083 3150.765
Model summary statistics  
Number of observations 8,710
F Statistic 77.96
Root Mean Squared Error 746.02
R2 0.2588

Source: SoFIE Wave 3 Version 4, adjusted longitudinal weight, Statistics New Zealand

Notes:
1. Based on original sample members who respond in Waves 1-3; who consent for their data to be linked to NZHIS information; are participating; and who are aged over 15 at the end of the reference period in Wave 1. Full-time students and those 65 years of age and over are excluded. All variables were included in the model and significant and insignificant variables or variable categories are kept in for completeness.
2. *Significant at the 90% level. **Significant at the 95% level. ***Significant at the 99% level.
3. Total annual hours worked was modelled.
4. The standard error and coefficients from this model are quite variable and in some cases quite high. Various tests for multicolinearity were undertaken but there was no evidence of multicolinearity. The high standard errors seem to be owing to the wide distribution in hours worked and the small number in some of the groups.

Page top