Table 1—

Demographic data of the study population and the participation rate in the OGTT of those invited: the DECODE study

Study cohort (Code)Mean age [range (years)]Participated in OGTT [n (%)]Men (%)Blood glucose sampleFasting timeTime of blood samplingGlucose assay methodYears of screeningLocation
MONICA-Sweden 1986 (1)47 (30–64)553 (78)50.6PlasmaOvernight7:45–10:00Glucose oxidase1986Suburban
MONICA-Sweden 1990 (2)47 (30–64)711 (63)47.0PlasmaOvernight7:45–10:00Glucose oxidase1990Suburban
MONICA-Sweden 1994 (3)52 (30–74)903 (62)48.4PlasmaOvernight7:45–10:00Glucose oxidase1994Suburban
MONICA-Finland (4)54 (40–64)1,841 (76)45.4PlasmaOvernight8:00–10:00Glucose dehydrogenase1992Urban
Oulu, Finland (5)76 (70–89)309 (78)38.8Capillary10–12 h8:00–10:00Glucose dehydrogenase1992Urban
Hoom, Dutch (6)62 (50–77)2,364 (71)46.4Plasma≥ 10 h8:00–10:00Glucose dehydrogenase1989–1991Urban
Newcastle, U.K. (7)55 (30–76)778 (91)51.7PlasmaOvernight8:00–10:00Glucose oxidase1992–1994Urban
MONICA-Poland (8)58 (44–73)359 (81)47.9Serum12 h8:00–11:00Glucose oxidase1992–1993Urban
Cremona, Italy (9)58 (40–89)1,672 (87)44.0Plasma≥ 12 h8:30–10:30Glucose oxidase1990–1991Urban
Viva, Spain (10)50 (34–69)1,948 (72)45.2PlasmaOvernight8:00–9:00Glucose oxidase1996–1997Urban and rural
Catalonia, Spain (11)54 (30–89)1,835 (93)42.3Capillary12 h9:00–11:00Refractometric1994Urban
Guia, Spain (12)55 (30–89)588 (100)44.6Plasma12 h8:00–10:00Glucose oxidase1997Island
Malta (13)49 (30–87)1,745 (73)43.2CapillaryOvernightMorningGlucose oxidase1981Island
Total54 (30–89)15,60645.4