Supplementary Methods - The Lancet

GS:SFHS participant data were linked at an individual level to the national hospitalisation register (Scottish Morbidity Record, SMR01) records.20 We used the International Classification of Disease, Tenth Version (ICD-10) J40 to J44 codes to identify those hospital admissions due to COPD exacerbations.48,60–71 Incident cases were defined as ... ................
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