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Table 4 Newcastle-Ottawa Quality Assessment Scale

From: A systematic review of studies describing the influence of informal social support on psychological wellbeing in people bereaved by sudden or violent causes of death

Adapted for cross-sectional studies  
  Selection Comparability Outcome
Study Representativeness of sample Sample size Non-respondents Ascertainment of exposure Confounding factors controlled Assessment of the outcome Statistical test Quality
Bailey 2013 [29] 1 0 1 2 0 1 1 Poor
Burke 2010 [33] 0 0 0 2 0 1 1 Poor
Cowan 1985 [27]a 1 0 0 2 1 1 1 Fair
Murphy 1988 [28] 1 0 0 2 1 1 1 Fair
Fullerton 1999 [36] 1 0 0 2 1 1 1 Fair
Heeke 2017 [38] 0 0 0 2 2 1 1 Fair
Kristensen 2010 [40] 1 0 1 2 1 1 1 Good
Levi-Belz 2015 [42] 1 0 0 2 0 1 1 Poor
Levi-Belz 2019 [43] 1 0 0 2 2 1 1 Good
Li 2015 [44] 1 0 0 2 0 1 1 Poor
Oexle 2019 [45] 0 0 1 2 2 1 1 Good
Rheingold 2015 [47] 1 0 0 2 1 1 1 Good
Spino 2016 [48] 0 0 0 2 0 1 1 Poor
Sprang 1998 [50] 1 0 0 2 2 1 1 Good
Xu 2017 [52] 1 0 0 2 1 1 1 Good
NOS for cohort studies  
  Selection Comparability Outcome
Representativeness Selection of non-exposed cohort Ascertainment of exposure Outcome of interest not present at start of study Comparability of cohorts Assessment of outcome Follow-up long enough for outcome to occur Adequacy of follow-up Quality
Bottomley 2017 [31] 0 n/a 1 0 1 1 1 1 Fair
  1. ataking into account only participants who were bereaved, not control participants