Table 1 Characteristics of the study population included in this study
Study | Year of publication | Study design | Data source | Country | All subjects | DR cases | Study period | Sex | Confounders for adjustment |
|---|---|---|---|---|---|---|---|---|---|
Gunnlaugsdottir E | 2012 | Prospective | Population based | Iceland | 4,995 | 138 | 1967-1997 | M/F | Age, sex, systolic BP. duration of DM, oral hypoglycaemic, HbA1c, hypertension and microlbuminuria |
Geir Bertelsen | 2012 | Prospective | Population based | Norway | 514 | 110 | 2007-2008 | M/F | Age, sex, systolic BP, oral hypoglycaemic, HbA1c, hypertension and microlbuminuria, BMI, glaucose |
Schweitzer K | 2009 | Prospective | Population based | American | 500 | 175 | 2004-2007 | M/F | NA |
Romero-Aroca P | 2007 | Prospective | Hospital based | Spain | 741 | 205 | 2005.1-2005.12 | M/F | NA |
Hove MN | 2004 | Restropective | Population based | Denmark | 10,851 | 378 | 2000.1-2000.12 | M/F | NA |
Henricsson M | 1996 | Prospective | Hospital based | Sweden | 1,378 | 438 | 1990-1995 | M/F | Age, sex and duration of diabetes |
Deng Y | 2014 | Prospective | Population based | China | 128 | 267 | 2009-2010 | M/F | Age of diabetic onset, duration of diabetes, BMI, microalbuminuria,HbA1c, fasting plasma glucose, creatinine |