PubMed · 1728815
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S T Mayne. 1992. Additional erroneous nomograms for BMI.. https://doi.org/10.1093/ajcn%2F55.1.144
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We propose an extension of the Harezlak and Heckman (J. Comput. Graph. Statist. 2001; 10(4): 713-729) test for detecting local extrema to the longitudinal data setting. We use penalized spline regression techniques (Statist. Sci. 1996; 11:89-102) to provide a computationally efficient method of testing for relatively large data sets. We estimate the p-values of our test, LongCriSP, with a smoothed bootstrap. Our simulation studies indicate that the test is generally conservative and has power exceeding 70 per cent at the alpha = 0.1 nominal level in most considered settings. Finally, we apply our testing procedure to the longitudinal measurements of body mass index of former prisoners of war in Vietnam and conclude that the mean population curve exhibits non-monotone behaviour.
We present a study of the pressures developed at the bony prominences (greater trochanter, iliac crest and sacrum) when a pelvic binder was applied to 10 healthy individuals. The pressures developed between the pelvic binder and the skin over the prominences were all greater than the pressure recommended at interfaces to avoid the development of pressure sores. This suggests that patients with pelvic fractures who are treated with temporary pelvic binders are at risk of developing pressure sores. This should be recognised and the skin inspected if the binder is to be in place for a prolonged period.
Hereby we report our observations derived from the study of a huge cross-sectional sample of the general population that metabolic risk factors (RFs) tend to cluster into metabolic syndrome (MS). The clustering trend was considered to be intensified with 4-5 RFs.