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Sources Of Error In Circumference Measurements

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A linear fit to circumference versus diameter gave a value for the ratio of circumference to diameter of 3.20. Int J Obes Relat Metab Disord 2000;24:1279–85. Full-text · Aug 2013 · Journal of occupational an...Read now Sarah Smith Otis Ozone George Washington HS Submitted April 18, 1984 MEASURING THE VALUE OF PI Goal Experimentally determine Results Participants (n = 41; aged 38.05 ± 3.54SD years; 71 % white) were all mothers that had at least one child under the age of 12 yrs. click site

Theoretically, C = pD. Statistical significance was set at P < 0.05.Home and lab self-measurements were compared to establish test-retest reliability (repeatability of measurements). Agreement between all possible pairs of measurements were examined using Intraclass Correlations (ICCs) and Bland-Altman plots. Theory The ratio of the circumference of a circle C to its diameter D is a number, named pi.

Waist To Hip Ratio

Kreatsoulas C, Hassan A, Subramanian S, Fleegler E. Approximately one-sixth of neck circumference self-measurements differed more than 10 % from technician measurements; this finding, along with the positive bias in neck measurements, indicates a need for improvement. Waist circumference and waist-hip ratio: Report of a WHO expert consultation, 8–11 December 2008. Criterion validity of a computer-based tutorial for teaching waist circumference self-measurement.

Participants underwent an interview, bioelectrical impedance analysis, and blood pressure measurement. doi: 10.1038/oby.2007.632. [PubMed] [Cross Ref]16. Does the relationship between waist circumference, morbidity and mortality depend on measurement protocol for waist circumference? Sarcopenic obesity: definition, cause and consequences.

doi: 10.1001/archpedi.161.12.1154. [PubMed] [Cross Ref]4. Goto R, Mascie-Taylor C. No findings could be located to establish reliability of self-measured neck circumferences.Training materials have been developed to improve circumference measurement accuracy. Measurements All measurements were made while subjects were wearing a hospital gown with minimal underwear and no shoes.

Because WC measurements are increasingly being promoted as part of clinical obesity evaluations, the present findings underscore important prevailing measurement issues and concerns that can form the basis of future research. Articles by Pierson, R. Nutr Cancer. 1991;15:179–86. All statistical calculations were performed with SAS version 8 (SAS Institute Inc, Cary, NC) and STATA version 7.0 (STATA Corp, College Station, TX) statistical software packages for personal computers.

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Rissanen P, Hamalainen P, Vanninen E, Tenhunen-Eskelinen M, Uusitupa M. Hillsdale: Erblaum; 1988. 67. Waist To Hip Ratio An even tighter agreement between participant and technician circumference measurements would further enhance the utility of self-measurements and may be feasible to achieve. doi: 10.1186/1475-2891-13-81. [PMC free article] [PubMed] [Cross Ref]20.

Validation study of self-reported measures of fat distribution. get redirected here Kos S, van Meerkerk A. The high reliability indicates that measurements individuals take over time can help them accurately track physical changes that may enable them, their health care providers, and researchers to better realize individuals’ One method, for example, would be to wrap a string around the cylinder and then measure the strings length.

  1. Booth et al (15) found that even self-reported WC estimates are useful for monitoring overweight and obesity in epidemiologic surveys.
  2. Int J Clin Pract. 2014;67:217–24.
  3. Another often-used tape measure, the Gulick II (Lafayette Instrument Co, Lafayette, IN), has a tension meter attached so that the tape’s tension can be standardized during measurement.
  4. However, for some subjects, there is no single narrowest point between the lowest rib and the iliac crest because of either a large amount of abdominal fat or extreme thinness.
  5. A few weeks later, participants visited an anthropometrics lab where they measured themselves again, and trained technicians (n = 9) measured participants in duplicate using standard equipment and procedures.
  6. Also, like other studies, there were no significant differences in mean waist and hip circumferences measured at home and in the lab by technicians [38, 41].

This finding also suggests that it is feasible to cost-effectively gather accurate self-measurements using a flexible, inelastic paper tape measure self-assembled from a pdf downloaded from the internet for large scale Abdel-Wareth L, Haq A, Turner A, Khan S, Salem A, Mustafa F, Hussein N, Pallinalakam F, Grundy L, Patras G, et al. Body fat distribution and risk of cardiovascular disease. navigate to this website Association of neck circumference and obesity status with elevated blood pressure in children.

To minimize measurement error, we recommend using a uniform measurement protocol, training and repeated measurements.PMID: 22626254 DOI: 10.1017/S1368980012002741 [PubMed - indexed for MEDLINE] SharePublication Types, MeSH TermsPublication TypesResearch Support, Non-U.S. technician measurements were within the a priori standard for differences and, hence, not deemed clinically meaningful. New York: Alan R Liss, 1988:193–201. ↵ Osukun IS, Tedders SH, Choi S, Dever GEA.

Anthropometric, computed tomography and fat cell data in an obese population: relationship with insulin, leptin, tumor necrosis factor-alpha, sex hormone binding globulin and sex hormones.

Arnold T, Schweitzer A, Hoffman H, Onyewu C, Hurtado M, Hoffman E, Klein C. The scale was partially covered during this process. The results of the regression equations relating trunk fat mass to WC at each site are shown in Table 8⇓. Generated Fri, 28 Oct 2016 15:45:05 GMT by s_wx1196 (squid/3.5.20)

To assess differences between self- and technician-measured circumferences, duplicate measurements for participant home self-measurements, participant lab self-measurements, and technician measurements each were averaged and Wilcoxon signed-rank tests conducted. However, limited information is available regarding validity and reliability of these automated measurements (AM) and their correlation with parameters of the Metabolic Syndrome (MetS) compared to traditional manual measurements (MM). doi: 10.1017/S0007114598001809. [PubMed] [Cross Ref]45. my review here In a literature search, we found 14 different descriptions of the WC measurement site (1, 3, 8, 9, 11, 12, 17–23).

Separate calculations were performed for the differences using each pair of WC sites. Validity of self-measured waist and hip circumferences: results from a community study in Malaysia. However, it is important to standardize the measurement location to immediately below the end of the lowest rib, which is usually at the anterior margin of the lateral regions of both Data Cylinder ID Circumference (m)

Diameter (m)

Circumference Diameter Skinny S2 0.0398 0.0120 3.32 Slim B3 0.0505 0.0163 3.10 Just Right 0.0612 0.0195 3.14 Plump B6 0.0797 0.0253 3.15 Pipe

Correlations of WC, HC, and the waist-to-hip ratio (WHR) with parameters of MetS were similar between AM and MM; for example the correlation of WC assessed by AM with HDL-cholesterol was New York: Oxford University Press; 1995. 66. In females, the mean for each site was significantly different from the other means, with WC2 < WC1 < WC3 < WC4.