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Table 3 Quality ratings for 7 cohort studies and 6 cross-sectional studies included on the basis of Newcastle-Ottawa quality assessment scale

From: Select physical performance measures and driving outcomes in older adults

Cohort studies   
  Representativeness of exposed cohort Selections of non-exposed cohort Assessment of exposure Absence of outcome at start of study Comparability Assessment of outcome Follow-up period (≥6 months) Adequacy of follow-up Total score out of 9 points
Ball et al., 2006 1 1 1 1 1 1 1 1 9 (high)
Edwards et al., 2010 1 1 1 1 2 0 1 1 8 (high)
Emerson et al., 2012 1 1 1 1 2 1 1 1 9 (high)
Gill et al., 2012 1 1 1 1 2 0 1 1 8 (high)
Marottoli et al., 1994 1 1 1 1 2 0 1 1 8 (high)
Sims et al., 2007 1 1 1 1 2 0 1 1 8 (high)
Woolnough et al., 2013 1 1 1 1 0 1 1 1 7 (medium)
Cross-sectional studies
  Representativeness of sample Sample size Non-respondents Ascertainment of primary measurement Comparability Ascertainment of the outcome Statistical test Total score out of 10 points
Carr et al., 2011 1 0 0 2 0 2 1 6 (medium)
Classen et al., 2013 1 0 0 2 2 2 1 8 (high)
Davis et al., 2011 1 0 0 2 2 2 1 8 (high)
Dawson et al., 2010 1 0 0 2 2 2 1 8 (high)
Langford et al., 2013a 1 1 0 2 0 1 1 6 (medium)
Stav et al., 2008 1 0 0 2 2 2 1 8 (high)
  1. aLangford et al., 2013 used baseline data from a prospective cohort study and analyzed the data obtained in a cross-sectional manner