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Table 2 Result of test of proportionality assumption for each covariate

From: Predictors for the duration of breastfeeding among ethiopia women of childbearing age with babies; application of accelerate failure time and parametric shared frailty models

Variable

rho

Chi-Square

Pr > Chi-Square

Wealth index

0.010

8.1129

0.0044

age of women

-0.001

0.4039

0.5251

religion

0.060

11.14

0.0035

Sex of child

0.001

34.56

0.9396

Child age

-0.004

484.5396

0.0001

smoking status

0.269

370.4742

0.0001

place of residence

-0.025

15.1925

0.0001

women education

0.125

93.860

0.0001

Global test

Wald-chi-square = 874.1111 with degree freedom 8, p-value < 0.01