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Table 5 Methodological quality of included quantitative studies (n = 8)

From: A systematic review of the impact of stigma and nihilism on lung cancer outcomes

Quality category Studies meeting criterion, n (%)
1. Subject Selection  
2. Representative of population of interest 1 (12.5)
1. Selected group 1 (12.5)
0. Highly selected or not described 6 (75.0)
2. Comparability of groups analysed on demographic characteristics  
2. Comparable (or matched) 1 (12.5)
1. Not comparable but adjusted analysis used 1 (12.5)
0. Not comparable and not adjusted for differences 3 (37.5)
Not applicable: no comparisons made 3 (37.5)
3. Participation rate  
2. High participation rate (>80%) and no important differences between participants and non-participants 0
1. Moderate participation rate (65-80%) and no important difference between participants and non-participants 0
0. Low participation rate (<65%), important differences between participants and non- participants or not described 8 (100)