Table 1 Quality criteria based on those proposed by Terwee and colleagues[9]
From: Assessment of the quality of measures of child oral health-related quality of life
Property | Quality criteria* |
|---|---|
Content validity | + a clear description is provided of the aim of the measure, the target population, concepts being measured and involvement of the target population and/or investigators or experts in item selection |
? A clear description of the above is lacking or only target population involved or doubtful design or method | |
- No target population involvement | |
0 No information on target population | |
Internal consistency | + Factor analyses on adequate sample size (7x the number of items and >100) and Cronbach’s alpha calculated per dimension and between 0.7 and 0.95 |
? No factor analysis or doubtful design or method | |
- Cronbach’s alpha <0.7 or >0.95 | |
0 No information found on internal consistency | |
Criterion validity | + Convincing argument that there is a “gold standard” and correlation >0.7 |
? No convincing argument that gold standard truly is “gold” or doubtful design or method | |
- Correlation with gold standard <0.7 | |
0 No information on criterion validity | |
Construct validity | + Specific hypotheses were formulated and at least 75% of the results are in accordance with these |
? Doubtful design or method | |
- Less than 75% hypotheses confirmed | |
0 No information on construct validity | |
Reproducibility | Agreement |
+ MIC > SDC or MIC outside LOA or convincing arguments that agreement is acceptable | |
? Doubtful design or method or above not fulfilled | |
- MIC > SDC or MIC equals or inside LOA | |
0 No information found on agreement | |
Reliability | |
+ ICC or weighted Kappa >0.7 | |
? Doubtful design or method (e.g. time interval not mentioned) | |
- ICC or weighted Kappa <0.7 | |
0 No information on reliability | |
Responsiveness | + SDC < MIC or MIC outside LOA or RR > 1.96 or AUC > 0.7 |
? Doubtful design or method | |
- SDC > MIC or MIC equals or inside LOA or RR < 1.96 or AUC < 0.7 | |
0 No information on responsiveness | |
Floor or ceiling effects | + < 15% of the respondents achieved the highest or lowest scores |
? Doubtful design or method | |
- > 15% of the respondents achieved the highest or lowest scores | |
0 No information found on interpretation | |
Interpretability | + Mean and SD scores presented for at least four relevant subgroups of patients and MIC defined |
? Doubtful design or method or less than four subgroups or no MIC defined | |
0 No information on interpretation |