Table 4

Unadjusted and adjusted exponentiated parameter estimates and confidence intervals for the zero-inflated Poisson regression models testing the association between lifetime earnings and multimorbidity

Logistic portion of the ZIP model

Model 4

Model 5

Model 6


Lifetime Earnings§

.55*

(.28, .91)

1.08

(.81, 1.42)

1.10

(.80, 1.51)

Gender

1.15

(.50, 2.64)

1.16

(.50, 2.71)

Age

.77***

(.67, .83)

.76***

(.66, .82)

Race

(white is reference)

.35

(.08, 1.45)

.32

(.08, 1.37)

Educational Attainment

(less than high school is reference)

High School/GED

2.03

(.73, 5.69)

Some College or more

.84

(.27, 2.55)

Poisson Portion of the ZIP model

Model 4

Model 5

Model 6


lifetime earnings§

.93***

(.91, .95)

.93***

(.91, .95)

.95***

(.93, .98)

Gender

1.14***

(1.08, 1.20)

1.11***

(1.05, 1.17)

Age

1.02***

(1.02, 1.03)

1.02***

(1.02, 1.03)

Race

(white is reference)

1.22

(.54, 2.78)

1.23

(.53, 2.83)

Educational Attainment

(less than high school is reference)

High School/GED

.26

(.06, 1.06)

Some College or more

1.76

(.63, 4.89)


p < .05; ** p < .01; *** p < .001; § Lifetime earnings was operationalized as average annual income from 1951 up to age 50 of the respondent CPI-U adjusted

Tucker-Seeley et al. BMC Public Health 2011 11:313   doi:10.1186/1471-2458-11-313

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