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Health and Labour Force Participation WP 10/03

Appendix G

Appendix Table G1 - Estimated coefficients for self-rated health -
ordered logistic regression model: 2002/03 to 2004/05
  Coefficients
  Wave 1 Wave 2 Wave 3
Sex (base=male)      
Female -0.133*** 0.016 -0.124***
Region (base=Auckland)      
Waikato 0.271*** 0.197*** 0.124***
Wellington 0.078 -0.049 0.310***
Rest of North Island 0.193*** 0.080 0.182***
Canterbury 0.084 -0.062 0.167***
Rest of South Island 0.279*** 0.337*** 0.055
Born in New Zealand (base=yes) 0.147*** 0.121** 0.581***
Ethnicity (base=NZ/European)      
Maori 0.350*** 0.344*** -0.090
Pacific Islander 0.162* 0.230** 0.234***
Other 0.312*** 0.459*** 0.135
Age at interview date 0.026*** -0.130*** 0.021***
Aged 50 and over (base=15-49)      
Aged 50 and over -0.294 -0.181 -0.008***
Highest qualification (base=school qualification)      
Post-school vocational qualification -0.018 -0.090** 0.347***
Degree or higher -0.342*** -0.363*** -0.070*
No qualification 0.317*** 0.296*** -0.316***
Asthma (base=no asthma) 0.485*** 0.340*** 0.440***
High blood pressure (base=no high blood pressure) 0.500*** 0.406*** 0.522***
High cholesterol (base=no high cholesterol) 0.177*** 0.507*** 0.156***
Heart disease (base=no heart disease) 0.917*** 0.154*** 0.915***
Diabetes (base=no diabetes) 1.086*** 0.884*** 0.975***
Stroke (base=no stroke) 0.736*** 0.859*** 0.519***
Migraine (base=no migraine) 0.368*** 0.594*** 0.386***
Psychiatric conditions (base=no psychiatric conditions) 0.953*** 0.381*** 0.986***
Cancer (base=no cancer)      
Cancer 0.418*** 0.873*** 0.582***
Unknown 0.095** 0.460*** 0.043
Studying (base=no studying) -0.170*** -0.129** 0.257***
Total household income -0.059*** -0.109*** 0.014
Partner (base=working partner)      
Non-working partner 0.158*** 0.264*** -0.055
No partner 0.128*** 0.100** 0.139***
Children (base=no children)      
Child(ren) minimum age 0-<5 -0.182*** -0.107* 0.133***
Child(ren) minimum age 5-17 -0.053 0.017 -0.042
Tenure (base=not owned)      
Owned with mortgage -0.140*** -0.006 -0.086***
Owned outright -0.123** 0.060 0.002
Years paid employment -0.014*** -0.010*** 0.052
Sickness benefit (base=no sickness benefit) 1.286*** 0.004 0.868***
Smoked (base=never smoked) 0.381*** 1.009*** 0.344***
Interactions      
Female*Psychiatric conditions -0.250** -0.063 -0.269**
Aged 50 and over*Age 0.005 0.024*** 0.002
Cut points      
Cut point 1 0.432 -0.013 0.015
Cut point 2 2.146 1.652 1.748
Cut point 3 4.025 3.515 3.601
Cut point 4 6.034 5.437 5.459
Model summary statistics      
Number of respondents 17,190 17,195 17,355
Chi-squared 3,629.70 3,918.74 3,601.95
Log-likelihood -19,648.90 -19,715.08 -20,633.86
Pseudo R2 0.1084 0.1131 0.1052

Source: SoFIE Waves 1-3 Version 4, standard longitudinal weights, Statistics New Zealand

Notes:

  1. Based on original sample members with responses in all three waves who are aged over 15 at the end of the reference period in Wave 1. Responses in each wave are included in the model separately. The number of observations in each wave is not equal owing to the small number of missing values for variables of interest in certain waves. 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. Psychiatric conditions include depression, manic depression and schizophrenia.
  4. The likelihood of different self-rated health states was modelled using an ordinal logistic regression model.
Appendix Table G2 - Estimated coefficients for labour force participation -
pooled logistic regression model - adjusted health stock: 2002/03 to 2004/05
  Coefficient Standard error P value 95% confidence intervals
        Lower Upper
Sex (base=male)          
Female -0.421*** 0.107 0.000 -0.630 -0.211
Region (base=Auckland)          
Waikato 0.196** 0.090 0.029 0.020 0.371
Wellington 0.041 0.075 0.581 -0.106 0.189
Rest of North Island 0.051 0.068 0.453 -0.082 0.183
Canterbury 0.122 0.075 0.107 -0.026 0.269
Rest of South Island 0.033 0.078 0.675 -0.121 0.186
Born in New Zealand (base=yes)          
No -0.090 0.067 0.180 -0.222 0.042
Ethnicity (base=NZ/European)          
Maori 0.000 0.069 0.997 -0.135 0.135
Pacific Islander 0.101 0.108 0.348 -0.110 0.312
Other -0.053 0.100 0.595 -0.249 0.143
Age at interview date -0.092*** 0.005 0.000 -0.103 -0.082
Aged 50 and over (base=15-49)          
Aged 50 and over 6.488*** 0.692 0.000 5.132 7.845
Highest qualification (base=school qualification)          
Post-school vocational qualification 0.163*** 0.056 0.004 0.053 0.274
Degree or higher 0.716*** 0.077 0.000 0.565 0.868
No qualification -0.249*** 0.064 0.000 -0.375 -0.123
Health stock -0.837*** 0.079 0.000 -0.991 -0.682
Studying (base=no studying) -0.381*** 0.056 0.000 -0.490 -0.272
Other household income -0.016*** 0.006 0.006 -0.028 -0.005
Partner (base=working partner)          
Non-working partner -1.266*** 0.109 0.000 -1.479 -1.053
No partner -0.978*** 0.105 0.000 -1.184 -0.771
Children (base=no children)          
Child(ren) minimum age 0-<5 0.507*** 0.163 0.002 0.188 0.826
Child(ren) minimum age 5-17 -0.357*** 0.108 0.001 -0.569 -0.145
Years paid employment 0.178*** 0.009 0.000 0.161 0.195
Years paid employment squared -0.001*** 0.000 0.000 -0.001 -0.001
Unemployment rate -0.088*** 0.032 0.005 -0.150 -0.026
Interactions          
Female*Child(ren) minimum age 0-<5 -2.782*** 0.171 0.000 -3.118 -2.446
Female*Child(ren) minimum age 5-17 -0.192 0.125 0.126 -0.437 0.054
Female*Non-working partner 0.082 0.152 0.590 -0.216 0.380
Female*No partner 0.423*** 0.117 0.000 0.193 0.653
Aged 50 and over*Age -0.131*** 0.013 0.000 -0.156 -0.105
Constant 4.147*** 0.233 0.000 3.690 4.604
Model summary statistics Coefficients
Number of observations 39,270
Number of unique respondents (clusters) 13,930
Chi-squared 3,333.23
Log-likelihood -12,723.33
Pseudo R2 0.3201

Source: SoFIE Waves 1-3 Version 4, unweighted, Statistics New Zealand

Notes:

1. See footnotes 1 and 2 of Table G1.

2. The likelihood of labour market participation was modelled. Not participating was the base category.

3. The number of observations the model is based on is lower than that for the self-rated health or individual disease models owing to small numbers of missing values for the objective health measures.

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