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Table 4 Schoenfeld residual test for proportionality assumption of the Cox model

From: Time to first birth and its predictors among reproductive-age women in Ethiopia: inverse Weibull gamma shared frailty model

Predictors Rho Chi2 df Prob > chi2
Geo-regions 0.056 91.18 1 < 0.001
Residence − 0.078 174.81 1 < 0.001
Religion − 0.061 82.37 1 < 0.001
Education level 0.071 107.88 1 < 0.001
Occupation − 0.055 80.36 1 < 0.001
Wealth index − 0.095 235.12 1 < 0.001
Spousal age difference − 0.108 231.14 1 < 0.001
Contraceptive use 0.193 1009.79 1 < 0.001
Media exposure 0.030 20.33 1 < 0.001
Age first marriage 0.220 1589.96 1 < 0.001
Age first sex 0.138 463.55 1 < 0.001
Husband education − 0.066 118.00 1 < 0.001
Husband occupation 0.019 13.02 1 < 0.001
Global test   6191.37 13 < 0.001
  1. < 0.001 means significant at 5% significance level; proportionality assumption is violated