Figure 4.3.

Simulation of Kaplan–Meier estimates for the time from inception (such as the onset of multiple sclerosis) to reaching the end point (such as onset of progression) among the 200 patients with multiple sclerosis in a fictitious cohort, according to the proportion of censored patients at the date of the survey. Medians and 95% confidence intervals (years): 0% censored: median 3.0, 95% CI 2.0–4.0; 20% censored: median 4.6, 95% CI 2.9–6.3; 40% censored: median 7.2, 95% CI 5.0–9.4; 60% censored: median 10.1, 95% CI 6.7–13.5; 80% censored: median 17.9, 95% CIs not assessable; 100% censored: not assessable.