Skip to main content
. Author manuscript; available in PMC: 2010 Aug 11.
Published in final edited form as: J Gerontol B Psychol Sci Soc Sci. 2007 Sep;62(5):S349–S357. doi: 10.1093/geronb/62.5.s349

Table 4.

Cox Models Showing Hazard Ratios for Dying (N = 13,325)a

Base
(i–x), Single Covariatesb
Individual + Community Characteristics
Adding Ill Health
Parsimonious Modelc
Variable 1 2 3 4 5
Rural residence 1.32** 1.18 1.19* 1.22**
Age (ref = 50–54)
 55–59 1.43* 1.40** 1.37* 1.40**
 60–64 2.01*** 1.91*** 1.86*** 1.95***
 65–69 4.03*** 3.77*** 3.61*** 3.82***
 70–74 6.37*** 5.82*** 5.55*** 6.01***
 75–79 9.93*** 8.81*** 8.31*** 9.17***
 80 + 22.20*** 19.05*** 18.79*** 21.42***
Gender (1 = male) 1.49*** 1.65*** 1.66*** 1.53***
Education (ref = more than primary)
 No education 1.27* 1.10 1.12
 Primary education 1.11 0.99 1.01
Is a cadre 0.42*** 0.49** 0.49** 0.44***
Occupation (ref = skilled/white collar)
 Unskilled/agricultural 1.38** 1.16 1.11
 Never worked/other/missing 1.42** 1.34* 1.28
Wealth quintile (ref = highest)
 Lowest quintile 1.11 0.95 0.88
 Second quintile 1.09 1.02 0.98
 Third quintile 1.18 1.08 1.03
 Fourth quintile 1.11 1.05 1.01
Has insurance 0.83* 0.92 0.88
Log average wage 0.89** 0.89** 0.86*** 0.89**
Number of amenities 0.94*** 0.95** 0.94*** 0.94***
Number medical facilities 1.01 1.01 1.01
Distance to nearest facility (ref = 0–.50 km)
 .51–2.00 km 0.99 0.97 1.00
 2.01+ km 1.10 1.06 1.07
 Missing distance information 0.78* 0.80 0.83
Ill health 2.06*** 2.15*** 2.15***
LL −6824.3 −6808.0 −6775.6 −6781.7
Δ −2LL from base 32.7*** 94.4*** 84.2***
θ 0.111*** 0.093*** 0.103*** 0.112***

Notes: i−x = 10 models (i−x), each of which includes base plus one additional covariate; LL = log likelihood.

a

Results of a shared frailty hazard model with standard errors of hazard ratios conditional on θ. N based on number of measured episodes.

b

Results represent a series of models that all adjusted for residence, age, and gender. Results for residence, age, gender, LL, and Δ −2LL not shown.

c

Addition of other covariates did not substantially change the urban coefficient or the Δ −2LL from base.

*

p < .10

**

p < .05

***

p < .01, two-tailed.