Table 1

Overview of the study population (n=19 709)

Cohort of originYear of examinationsNo of menNo of womenAge at examinationsNo of hospital admissions†
*The MONICA project is an international study conducted by the World Health Organisation to monitor trends in, and determinants of, mortality from cardiovascular disease. †Participants with a register diagnosis of COPD before enrolment (n=149) were excluded.
GPS, 1897 cohort1967/778411270–80246
GPS, 1914 cohort1964/7433128450–6012
GPS, 1936 cohort1976/8145650040–4563
MONICA I*1981/881499145330–6522