Figure 1.

Patient selection. *An eligible adult SSc-ILD patient was defined as a patient with either ≥1 hospital stay with a diagnosis code (principal, related or associated) of lung fibrosis, or ≥1 hospital stay with a diagnosis code (principal, related or associated) of SSc and/or a patient who benefited from full coverage for SSc (patients fully reimbursed for their claims related to SSc). ILD diagnosis could be made after, or within 6 months prior to, SSc diagnosis. ILD, interstitial lung disease; SNDS, Système National des Données de Santé; SSc, systemic sclerosis.