102). Therefore, there is a need to establish reliability and validity levels for the methods used by these researchers.
Data analysis. The analysis of the data included the following:
1. Calculation of body mass indexes (BMI) calculated from measured weight and height at baseline and again one year following enrollment in the intervention program, which is a standard approach to determining overweight and obesity levels (Singh 2004; Klesgas, Klem & Klesges 1999);
2. A comparison of growth changes in the intervention and control groups;
3. The mean number of dietary advice provided; and,
4. The relation between change in BMI z-score, life-style and number of visits at school care centres among intervened children.
Strength of the evidence. The evidence used to formulate the key findings of this study was weakened by differences in the attitudes, approaches and availability of the nursing staff assigned to conduct the research.
Potential alternative interpretations of the data. The results that emerged from this study could be attributed to other factors at work in these families, with the positive outcomes being the result of increased awareness on the part of the children and parents of the problem in the first place.
Limitations....
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