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Recent literature reporting on the validity of questionnaire administration methods shows time between administering questionnaires ranging from five minutes [ 20] to several weeks [ 21].
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'Shorter' questionnaires ranged from seven to 47 questions and 'longer' questionnaires ranged from 36 to 123 questions.
Correlations of SeMaS sum scores with the original questionnaires ranged from 0.418 to 0.805.
Return rates of the questionnaires ranged from 73% (Germany) to 99% (Belgium and France).
The numbers of analysable questionnaires ranged from 726 in Lagos state to 776 in Rivers state.
Response rates to the nurses' pre-implementation questionnaires ranged from 65.5%to94.7%7% (average response rate 71%, see Table 3).
The number of weeks between completing the baseline and postintervention questionnaires ranged from 4.71 to 17.57 (mean=7.51, s.d.=2.5).=2.5
Mean scores on both questionnaires range from 0 to 100 with higher scores indicating better quality of life.
The correlation between adherence measured by MEMS and self-report questionnaires ranged from 0.24 to 0.87 for the 11 articles.
The rest of the items in the questionnaires ranged from 1 (Always), 2 (Often), 3 (Sometimes), and 4 (Never).
First, the response categories in the interview protocol and questionnaires range from '1' never' to '4' always.
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