Table 2

Newcastle-Ottawa quality assessment scale for cohort studies

Study reference (author, year)SelectionComparabilityOutcome
Type 2 diabetes
 Sasaki, 1989 (19)********
 Hanis, 1993 (16)********
 Miettinen, 1996 (7)*******
 Forsblom, 1998 (20)*******
 Klein, 1999 (4)*******
 Kim, 2002 (21)*******
 Ono, 2002 (22)*******
 Rius Riu, 2003 (23)********
 Gimeno-Orna, 2006 (24)*******
 Cheung, 2007 (25)********
 Cheung, 2007 (26)********
 Lövestam-Adrian, 2007 (27)******
 Juutilainen, 2007 (28)********
 Tong, 2007 (29)*******
 Cheung, 2008 (30)********
 Liew, 2009 (31)********
 Gimeno-Orna, 2009 (32)*******
Type 1 diabetes
 Klein, 1999 (4)*******
 Weis, 2001 (33)*******
 Torffvit, 2005 (34)********
 Soedamah-Muthu, 2008 (5)********