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2 results on '"Tadeusz Nawarycz"'

1. Waist circumference and waist-to-height ratio distributions in polish and german schoolchildren: Comparative analysis

Author

Tadeusz Nawarycz, Gerda-Maria Haas, Alicja Krzyzaniak, Peter Schwandt, and Lidia Ostrowska-Nawarycz

Subjects
Abdominal obesity, children and adolescents, waist circumference, waist-to-height ratio, Medicine
Abstract

Background: To analyze differences in the distributions of waist circumference (WC) and waist-to-height ratio (WHtR) between Polish (PL) and German (GE) children and adolescents. Methods: Two samples of children and adolescents aged 7-18 y: From PL ( n = 11,326) GE ( n = 8,218) participated. The two WC cut-off points (WC1 as central fat distribution and WC2 as central obesity) corresponding at age 18 to the adult criteria were determined. Furthermore, the mean WC cut-off points (WC1m, WC2m) for boys and girls aged 14-18 from both countries were evaluated. For the WHtR, values over 0.5 were used as a definition of central fat distribution. The effect of different WC and WHtR criteria on the prevalence of abdominal obesity in both study groups was evaluated. Results: The mean and percentile values of WC and WHtR were generally higher in all German children as compared to their peers from Poland. When WC1m is used, the mean (95% CI) prevalence of central fat distribution in the 14-18 y Polish groups was lower ( P < 0.05) than those from Germany (boys: 4.4% (3.6-5.2) vs. 8.9% (7.3-10.5); girls: 10.7% (9.0-12.3) vs. 26.4% (23.2-29.6)), whereas, using the WHtR > 0.5, the results were similar for boys - 6.7% (5.9-7.5) vs. 8.5% (8.1-8.9); they were significantly ( P < 0.05) lower for Polish and German girls: 5.3% (5.0-5.6) vs. 12.7% (9.7-16.4). The prevalence of central obesity using WC2m as a criterion in the Polish vs. German groups was as follows: (boys - 1.1% (0.8-1.4) vs. 3.1% (2.2-4.0), P < 0.05; girls - 3.1% (2.5-3.7) vs. 10.2% (8.4-12.0), P < 0.05). Conclusions: The results highlight the greater central obesity associated with the German children, both in terms of WC and WHtR, in comparison to their peers from Poland. The prevalence of AO is significantly associated with the criteria used. The results demonstrate the need for the development of international WC references for pediatric subjects.

Published
2013

2. Height-specific blood pressure cutoffs for screening elevated and high blood pressure in children and adolescents : an international study

Author

Yaping Hou, Małgorzata Krzywińska-Wiewiorowska, Pierre Traissac, Mieczysław Litwin, Lavanya Parthasarathy, Alicja Krzyżaniak, Habiba Ben Romdhane, Anuradha Khadilkar, Tadeusz Nawarycz, Bo Xi, Shashi Chiplonkar, Mohammad Esmaeil Motlagh, Mostafa Qorbani, Roya Kelishadi, Young Mi Hong, Pascal Bovet, Lidia Ostrowska-Nawarycz, Ramin Heshmat, Barbara Stawińska-Witoszyńska, Vaman Khadilkar, Min Zhao, Arnaud Chiolero, Gelayol Ardalan, Hae Soon Kim, Jalila El Ati, Liu Yang, Hajer Aounallah-Skhiri, and Neha Kajale

Subjects
Male, medicine.medical_specialty, Percentile, Adolescent, Physiology, Elevated bp, Blood Pressure, 030204 cardiovascular system & hematology, elevated blood pressure, Sensitivity and Specificity, Cohort Studies, 03 medical and health sciences, Sex Factors, 0302 clinical medicine, children, Predictive Value of Tests, Epidemiology, Internal Medicine, Humans, Mass Screening, Table (landform), Cutoff, Medicine, 030212 general & internal medicine, adolescents, Child, 610 Medicine & health, Reference table, business.industry, Age Factors, Area under the curve, Reproducibility of Results, methodology, Body Height, Cross-Sectional Studies, Blood pressure, Area Under Curve, Hypertension, Female, epidemiology, Cardiology and Cardiovascular Medicine, business, 360 Social problems & social services, Demography, high blood pressure
Abstract

Pediatric blood pressure (BP) reference tables are generally based on sex, age, and height and tend to be cumbersome to use in routine clinical practice. In this study, we aimed to develop a new, height-specific simple BP table according to the international child BP reference table based on sex, age and height and to evaluate its performance using international data. We validated the simple table in a derivation cohort that included 58,899 children and adolescents aged 6-17 years from surveys in 7 countries (China, India, Iran, Korea, Poland, Tunisia, and the United States) and in a validation cohort that included 70,072 participants from three other surveys (China, Poland and Seychelles). The BP cutoff values for the simple table were calculated for eight height categories for both the 90th ("elevated BP") and 95th ("high BP") percentiles of BP. The simple table had a high performance to predict high BP compared to the reference table, with high values (boys/girls) of area under the curve (0.94/0.91), sensitivity (88.5%/82.9%), specificity (99.3%/99.7%), positive predictive values (93.9%/97.3%), and negative predictive values (98.5%/97.8%) in the pooled data from 10 studies. The simple table performed similarly well for predicting elevated BP. A simple table based on height only predicts elevated BP and high BP in children and adolescents nearly as well as the international table based on sex, age, and height. This has important implications for simplifying the detection of pediatric high BP in clinical practice.

Published
2019

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