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The performance of the PDMS-coated fiber in LDPE membrane bag was tested by time-dependent exposure in a flow-through system at 19°C.
Interactions between all variables were investigated and the assumption of proportional hazards was tested by including time dependent variables in the model.
As a result, SH-Silica based composite showed higher self-healing efficiency as evidenced by time dependent healing tests.
The assumption of the Cox proportional hazards model was tested by introducing time-dependent covariates and multiplying each covariate by the time of follow-up.
Multivariate analysis was performed using Cox' proportional hazard model with adjustment for indicators of propensity score quintile to estimate adjusted HRs and corresponding 95% CIs. 17 The assumption of proportionality of the hazards was tested by including time-dependent covariates in the Cox model.
The proportionality assumption was tested by adding a time-dependent covariate for each factor.
The proportional hazard assumption was tested by including a time-dependent interaction term in the model (likelihood ratio test) for continuous variables and by inspection of log-minus-log plots for categorical covariates.
Differences between RMT of the left versus right hemisphere were tested by dependent t-tests.
The cumulative hazard assumption was tested by Schoenfeld residuals and by testing the time-dependent coefficients (Therneau and Grambsch, 2000).
9 We test for time-dependent effects of the coefficients in the model by testing the significance of interaction terms between and β.
The growth mechanism was revealed by time-dependent growth analyses.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com