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Trials which fulfilled over half of the validity items were considered to be of "sufficient methodological quality".
Out of the 10 randomized controlled trials that evaluated interventions for physically frail community-living elderly on disability, 9 were considered to be of sufficient methodological quality.
Six controlled trials were judged to be of sufficient methodological quality to provide reliable evidence about the impact of interventions on teenage pregnancy rates.w1-w3 w6 w7 w9 All these trials were conducted in the US and targeted disadvantaged groups of children and young people (tables 2 and 3).
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Of these, 9 were of sufficient methodological quality and concerned 2 nutritional interventions and 8 physical exercise interventions.
Only the trial by Hall [ 20] did not fulfill at least four criteria and was considered to be of insufficient methodological quality; the other seven trials were of sufficient methodological quality.
Of the eight randomized controlled trials evaluating the effectiveness of intensive home visiting programs for older people with poor health or otherwise with functional impairments, seven were of sufficient methodological quality according to the predefined standard.
Seven trials were of sufficient methodological quality; none of the trials showed a significant favorable effect for the main analysis comparing the intervention group with the control group on mortality, health status, service use or cost.
Trials with at least four fulfilled validity items were considered to be of 'sufficient methodological quality' [ 18]; only those were included in the evaluation of the effectiveness.
Furthermore, it will be possible to examine if there are statistically significant differences in a study of sufficient methodological strength and robustness.
Too few papers of sufficient methodological rigour were identified.
5 6 7 8 One of these found only four studies of sufficient methodological quality to reliably evaluate interventions to promote hand hygiene and was unable to reach firm conclusions.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com