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Table 5 Newcastle–Ottawa Scale assessment for cohort studies (Ottawa Hospital Research Institute 2019; Singh et al. 2015)

From: Safe use of radiopharmaceuticals in patients with chronic kidney disease: a systematic review

Study Selection Comparability Outcome Total score
Representativeness of the exposed cohort Selection of the non-exposed cohort Ascertainment of exposure Demonstration that outcome of interest was not present at start of study Comparability of cohorts on the basis of the design or analysis Study controls for any additional factor Assessment of outcome Follow-up long enough for outcomes to occur Adequacy of follow-up of cohorts
Akers et al. (2016) * * 0 0 0 0 0 * * 4
Minamimoto et al. (2007) * * 0 * * 0 0 * * 6
  1. '*' means one awarded point
  2. Good-quality: awarded 3–4 stars in the selection domain and 1–2 stars in the comparability domain and 2 stars in the outcome domain. Fair studies: awarded 2 stars for selection and 1–2 stars for comparability and 1–2 stars for outcome. Poor-quality: awarded 0–1 stars for selection or 0 for comparability or 0 for outcome (Singh et al. 2015)