Fig. 4: Associations of nirmatrelvir-ritonavir with post-acute sequelae stratified by different times to treatment initiation.

Covariates were adjusted for using standardized mortality ratio weighting. The measure of centre for the error bars is the hazard ratio, and the error bars represent the 95% confidence intervals from cause-specific Cox proportional hazards models. The statistical test used was a two-sided Wald test. The axis is in log scale.