Nurses' retention and hospital characteristics in New South Wales, CHERE Discussion Paper No 52



NURSES’ RETENTION AND HOSPITAL CHARACTERISTICS IN NEW SOUTH WALES

APPENDIX 1

In this section of the paper we compare the analysis sample of RNs used above to the full sample of
RNs working in the NSW public sector.

Appendix Table 1: Sample means

VARIABLE

FULL SAMPLE

ANALYSIS SAMPLE

MEAN

STD. DEV

MEAN

STD. DEV

working 97

0.7894

0.4214

0.8050

0.4085

male

0.0853

0.2794

0.0814

0.2734

age

39.0865

9.6968

38.9509

9.4791

foreign born

0.1425

0.3496

0.1266

0.3325

UK born

0.0869

0.2818

0.0818

0.2741

NZ born

0.0195

0.1382

0.0191

0.1369

foreign citizen

0.0706

0.2562

0.0685

0.2526

not permanent resident

0.0009

0.0306

0.0005

0.0221

work hours

36.1319

15.9408

36.1520

16.0382

post basic qualifications

0.5723

0.4876

0.5836

0.4887

years registered

15.1886

9.0748

15.2330

8.8935

unemployment rate

6.8348

3.0944

6.7019

3.3802

activity surgical

0.2503

0.4332

0.2693

0.4436

activity psych

0.1623

0.3688

0.1435

0.3506

job clinical

0.2711

0.4446

0.2872

0.4525

job managerial

0.0547

0.2274

0.0569

0.2317

region other metropolitan

0.1071

0.3092

0.1079

0.3102

region non metropolitan

0.1438

0.3509

0.2144

0.4104

sample size

25568

16393

A comparison of the means for the two samples reveals relatively small differences in almost all
explanatory variables. The largest discrepancy is in the regional dummies: our analysis sample has
more observations in non metropolitan areas. Nurses working in metropolitan areas (including
capital cities) were more likely to omit the job postcode and in some cases, we could not match the
reported postcode to a specific hospital. Appendix Table 2 presents the coefficients from a probit
regression similar to that presented in left hand columns of Table 4 but run on the of all RNs working
in public hospitals in NSW.

A comparison of the coefficients of Appendix Table 2 with Table 4 shows that the effects of the
personal and job characteristics are very similar for the full sample and our analysis sample. The
only substantial difference involves the foreign born dummy variable which has a stronger positive
effect in the full sample.

A sample selection procedure incorporating the observations with missing hospital information is
problematic because of the lack of an instrument identifying the retention probability model from the
selection process. As a simple check on the possible selection problems we estimated a probit for
selection into the analysis sample and included the predicted probability in the retention probit. The
first stage probit included all of the variables listed in Appendix Table 2. In the second stage probit,
the results for the hospital variables were unaffected by the inclusion of the predicted probability and
the coefficient on this probability was insignificant.

Given these results, it is unlikely that such a procedure would add anything to the analysis presented
in the main text.

18



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