British 1990 growth reference centiles for weight, height, body mass index and head circumference fitted by maximum penalized likelihood

Cole, Tim; Freeman, Jenny; Preece, M A

doi:10.1002/(sici)1097-0258(19980228)17:4<407::aid-sim742>3.0.co;2-l

Cited by 1,004 publications

(696 citation statements)

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“…Height is an example of Normally distributed data, yet log height is also acceptably Normal as well } see Section 4.6 for example. Height has a small CV, 4 per cent or so [17], which means that transformation does not introduce much skewness. In any case, if results are required in percentage units, this may be su$cient reason for a log transformation even though the data are not particularly skew.…”

Section: Discussionmentioning

confidence: 99%

“…(The same coe$cient can also be interpreted as the power of bone width when the regression equation is antilogged, but this is not discussed further here.) Another example appears in Table II of Cole et al [17], where di!erences in height and weight between data sets estimated by regression analysis are presented in sympercent units.…”

Section: Group Comparison By Regression Analysismentioning

confidence: 99%

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Sympercents: symmetric percentage differences on the 100 loge scale simplify the presentation of log transformed data

Cole¹

2000

Statist. Med.

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297

246

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Section: Discussionmentioning

confidence: 99%

Section: Group Comparison By Regression Analysismentioning

confidence: 99%

Sympercents: symmetric percentage differences on the 100 loge scale simplify the presentation of log transformed data

Cole¹

2000

Statist. Med.

Self Cite

297

246

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“…Growth was assessed according to height, weight, and body mass index (BMI) and these data were converted to standard deviation (Z) scores [14]. Statistical analysis was performed using STATA 8 software [15].…”

Section: Methodsmentioning

confidence: 99%

Anemia in pediatric renal transplant recipients

Kausman

Powell

Jones

2004

Pediatric Nephrology

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The aim of this study was to establish the prevalence of anemia in stable pediatric renal transplant recipients and to examine the association of anemia with renal function, immunosuppressants, angiotensin converting enzyme inhibitors, and growth, as well as iron, vitamin B(12), and folate stores. This is a cross-sectional study of the 50 renal transplant recipients currently followed at our center. Patient data were collected regarding hematological parameters, growth, medications, renal function, underlying renal disease, delayed graft function, episodes of rejection, and iron or erythropoietin therapy post transplantation. The mean hemoglobin level (Hb) was 110 g/l and the overall prevalence of anemia was 60%, including 30% who were severely anemic (Hb<100 g/l). There was a high rate of iron deficiency (34%) and serum iron was the parameter of iron metabolism most closely associated with anemia. Hb in patients with low serum iron was 90.7 g/l versus 114.4 g/l in those with normal serum iron ( P<0.01). Both univariate and multiple linear regression determined tacrolimus dose and creatinine clearance to be significant factors associated with anemia. Tacrolimus dose correlated with a 10 g/l reduction in Hb for every increase of tacrolimus dose of 0.054 mg/kg per day ( P=0.001). The dose of mycophenolate was positively correlated with Hb, but this was likely to be confounded by our practice of dose reduction in the setting of anemia. Angiotensin converting enzyme inhibitor use was not associated with anemia. Severely anemic patients tended to be shorter, with a mean Z-score for height of -1.8 compared with -0.9 for those with normal Hb ( P=0.02). Anemia is a significant and common problem in pediatric renal transplant patients. Deteriorating renal function is an important cause, but other factors like iron deficiency and immunosuppression are involved. Definition of iron deficiency is difficult and serum iron may be a valuable indicator. Medication doses, nutritional status, need for erythropoietin and iron, as well as poor graft function and growth require systematic scrutiny in the care of the anemic renal transplant recipient.

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“…BMI was calculated as body weight (kg) divided by height (m) squared (kg/m 2 ). BMI-z scores were subsequently calculated using the LMS Growth method (Cole et al 1998). Skinfold thickness was measured with a Holtain Caliper to the nearest 0.2 mm in triplicate in the left side at biceps, triceps, subscapular, suprailiac, thigh, and medial calf (Crymych, UK) ).…”

Section: Physical Examinationmentioning

confidence: 99%

Muscular strength and markers of insulin resistance in European adolescents: the HELENA Study

et al. 2011

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The aim of the study was to examine the association of muscular strength with markers of insulin resistance in European adolescents. The study comprised a total of 1,053 adolescents (499 males; 12.5-17.5 years) from ten European cities participating in the Healthy Lifestyle in Europe by Nutrition in Adolescence (HELENA) Cross-Sectional Study. Muscular strength was measured by the handgrip strength and standing long jump tests. Cardiorespiratory fitness was measured by the 20-m shuttle run test. Fasting insulin and glucose were measured and the homeostasis model assessment (HOMA) and quantitative insulin sensitivity check index (QUICKI) indices were calculated. Weight, height, waist circumference and skinfold thickness were measured, and body mass index (BMI) was calculated. In males, the handgrip strength and standing long jump tests were negatively associated with fasting insulin and HOMA (all P < 0.05) after controlling for pubertal status, country and BMI or waist circumference. When skinfold thickness was included in the model, the association became non-significant. In females, the standing long jump test was negatively associated with fasting insulin and HOMA (all P < 0.001) after controlling for pubertal status, country and surrogate markers of total or central body fat (BMI, waist circumference or skinfold thickness). Findings were retained in males, but not in females after controlling for cardiorespiratory fitness. The findings of the present study suggest that preventive strategies should focus not only on decreasing fatness and increasing cardiorespiratory fitness but also on enhancing muscular strength.

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British 1990 growth reference centiles for weight, height, body mass index and head circumference fitted by maximum penalized likelihood

Cited by 1,004 publications

References 0 publications

Sympercents: symmetric percentage differences on the 100 loge scale simplify the presentation of log transformed data

Sympercents: symmetric percentage differences on the 100 loge scale simplify the presentation of log transformed data

Anemia in pediatric renal transplant recipients

Muscular strength and markers of insulin resistance in European adolescents: the HELENA Study

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