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Table 3 Newcastle-Ottawa Score for included studies

From: Longitudinal studies that use data collected as part of usual care risk reporting biased results: a systematic review

ID Articles Representativeness of exposed cohort Selection of non-exposed cohort Ascertainment of exposure Demonstration outcome was not present at start of study Study controls for important factor Study controls for additional factors Assessment of outcome follow-up duration Adequacy of follow-up Overall Quality Score
   Selection Comparability Outcome  
1 Adams et al. * * * * * * * 7
2 Astrom et al. * * * * * * * 7
3 Bernstein et al. * * * * * * * * 8
4 Biskupiak et al. * * * * * * * 7
5 Bradford et al. * * * * * 5
6 Cheung et al. * * * * * 5
7 Coplan et al. * * * * * 5
8 Dhawale et al. * * * * * * 6
9 Elmelund et al. * * * * * * * * * 9
10 Fattah et al. * * * * * * * 7
11 Fatti et al. * * * * * * * * 8
12 Flack et al. * * * * * * 6
13 Fong et al. * * * * * * * * * 9
14 Gao et al. * * * * * * * * 8
15 Ghate et al. * * * * * * * 7
16 Gofman et al. * * * * * * * * * 9
17 Guelinckx et al. * * * * 4
18 Haas et al. * * * * * * * 7
19 Heintzelman et al. * * * * * * * * 8
20 Henes et al. * * * 3
21 Jehi et al. * * * * * 5
22 Kharbanda et al. * * * * * * * * 8
23 Lasko et al. * * * * * * * 7
24 Maahs et al. * * * * * * * * 8
25 Mahmud et al. * * * * * * * 7
26 Mancevski et al. * * * * * * * * * 9
27 McCoy et al. * * * * * * * * * 9
28 Nannetti et al. * * * * * * 6
29 Pan et al. * * * * * * * * * 9
30 Patterson et al. * * * * * * * * * 9
31 Pirraglia et al. * * * * * * * * 8
32 Roth et al. * * * * * * * * 8
33 Ruiz et al. * * * * * * * * 8
34 Sarafoglou et al. * * * * * * * * * 9
35 Schwartz et al. * * * * * * * * 8
36 Snijder et al. * * * * * * * 7
37 Sy et al. * * * * * * 6
38 Tamayo et al. * * * * * * * * 8
39 Tanabe et al. * * * * * * 6
40 Ting et al. * * * * * * * 7
41 Ullrich et al. * * * * * * 6
42 Walker et al. * * * * * * 6
43 Wong et al. * * * * * * * * 8
44 Zechmann et al. * * * * * * 6