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Kaplan–Meier curve showing the cumulative fraction of patients treated for chronic central serous chorioretinopathy (cCSC).
Notes: Endpoint: “Complete resolution of subretinal fluid (SRF) after photodynamic therapy”; the median duration to SRF resolution in cCSC patients with a severe phenotype of the disease (cases) was 8 weeks (95% CI: 7–9). In cCSC patients who did not meet the criteria of severity (controls), the median duration was 7 weeks (95% CI: 7–8; log-rank test; P=0.281).
