Limits...
Body adiposity index performance in estimating body fat in a sample of severely obese Brazilian patients.

Belarmino G, Horie LM, Sala PC, Torrinhas RS, Heymsfield SB, Waitzberg DL - Nutr J (2015)

Bottom Line: In Mexican-American and African-American populations, BAI has performed better than body mass index (BMI).For each studied variable, BAI exhibited a systematic bias, as evidenced by a tendency for low BF% values to be overestimated.For Brazilian patients with severe obesity, BAI does not provide an accurate estimate of BF%.

View Article: PubMed Central - PubMed

Affiliation: Department of Gastroenterology, Surgical Division, LIM 35.University of São Paulo School of Medicine, São Paulo, Brazil. giliane85@hotmail.com.

ABSTRACT

Background/objectives: The body adiposity index (BAI) estimates the amount of body fat (BF) in humans. In Mexican-American and African-American populations, BAI has performed better than body mass index (BMI). The aim of this study was to evaluate the performance of BAI in estimating percentage (BF%) in severely obese Brazilian patients, with air displacement plethysmography (ADP) used as the reference method.

Subjects/methods: Estimation of BF% by ADP, anthropometric measurements (height, abdominal and hip circumferences, body weight, and BMI) and BAI calculation were performed in 72 obese subjects (BMI ≥ 30 kg/m(2)) aged 30-55 years.

Results: The mean BF% estimates ± standard deviation were 52.1 ± 5.7 % for ADP and 47.7 ± 7.4% for BAI, with a positive Pearson correlation (rp = 0.66) and a positive Lin's concordance correlation (rc = 0.479) observed between these methods. The 95% limits of individual agreement between BAI and ADP ranged from -5.769% to 16.036%, with BAI exhibiting an average positive bias of 5.13% compared to the reference method. For each studied variable, BAI exhibited a systematic bias, as evidenced by a tendency for low BF% values to be overestimated.

Conclusion: For Brazilian patients with severe obesity, BAI does not provide an accurate estimate of BF%.

No MeSH data available.


Related in: MedlinePlus

Bland-Altman plot showing limits of agreement between BF% by BAI vs. ADP. Bold continuous line indicates observed average agreement. Continuous line indicates line of perfect average agreement. Dashed lines indicate 95 % limits of agreement. Lin’s concordance correlation coefficient (rc) is shown
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Fig1: Bland-Altman plot showing limits of agreement between BF% by BAI vs. ADP. Bold continuous line indicates observed average agreement. Continuous line indicates line of perfect average agreement. Dashed lines indicate 95 % limits of agreement. Lin’s concordance correlation coefficient (rc) is shown

Mentions: Table 1 provides the baseline demographic and anthropometric data of the 72 obese patients assessed. The mean BF% estimates measured by ADP and BAI were 52.05 ± 5.66 % and 47.65 ± 7.38 %, respectively, with rp = 0.66 and rc = 0.479. The 95 % limits of individual agreement between BAI and ADP were −5.77 % to 16.04 % (range: 21.8 %), as shown in Fig. 1. These limits of individual agreement were higher than those found between BMI and ADP (−7.34 % to 16.72 %, range: 24.1 %; rp = 0.39), as shown in Fig. 2. However, the BAI exhibited an average positive bias of 5.13 % compared to the reference method.Table 1


Body adiposity index performance in estimating body fat in a sample of severely obese Brazilian patients.

Belarmino G, Horie LM, Sala PC, Torrinhas RS, Heymsfield SB, Waitzberg DL - Nutr J (2015)

Bland-Altman plot showing limits of agreement between BF% by BAI vs. ADP. Bold continuous line indicates observed average agreement. Continuous line indicates line of perfect average agreement. Dashed lines indicate 95 % limits of agreement. Lin’s concordance correlation coefficient (rc) is shown
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4697330&req=5

Fig1: Bland-Altman plot showing limits of agreement between BF% by BAI vs. ADP. Bold continuous line indicates observed average agreement. Continuous line indicates line of perfect average agreement. Dashed lines indicate 95 % limits of agreement. Lin’s concordance correlation coefficient (rc) is shown
Mentions: Table 1 provides the baseline demographic and anthropometric data of the 72 obese patients assessed. The mean BF% estimates measured by ADP and BAI were 52.05 ± 5.66 % and 47.65 ± 7.38 %, respectively, with rp = 0.66 and rc = 0.479. The 95 % limits of individual agreement between BAI and ADP were −5.77 % to 16.04 % (range: 21.8 %), as shown in Fig. 1. These limits of individual agreement were higher than those found between BMI and ADP (−7.34 % to 16.72 %, range: 24.1 %; rp = 0.39), as shown in Fig. 2. However, the BAI exhibited an average positive bias of 5.13 % compared to the reference method.Table 1

Bottom Line: In Mexican-American and African-American populations, BAI has performed better than body mass index (BMI).For each studied variable, BAI exhibited a systematic bias, as evidenced by a tendency for low BF% values to be overestimated.For Brazilian patients with severe obesity, BAI does not provide an accurate estimate of BF%.

View Article: PubMed Central - PubMed

Affiliation: Department of Gastroenterology, Surgical Division, LIM 35.University of São Paulo School of Medicine, São Paulo, Brazil. giliane85@hotmail.com.

ABSTRACT

Background/objectives: The body adiposity index (BAI) estimates the amount of body fat (BF) in humans. In Mexican-American and African-American populations, BAI has performed better than body mass index (BMI). The aim of this study was to evaluate the performance of BAI in estimating percentage (BF%) in severely obese Brazilian patients, with air displacement plethysmography (ADP) used as the reference method.

Subjects/methods: Estimation of BF% by ADP, anthropometric measurements (height, abdominal and hip circumferences, body weight, and BMI) and BAI calculation were performed in 72 obese subjects (BMI ≥ 30 kg/m(2)) aged 30-55 years.

Results: The mean BF% estimates ± standard deviation were 52.1 ± 5.7 % for ADP and 47.7 ± 7.4% for BAI, with a positive Pearson correlation (rp = 0.66) and a positive Lin's concordance correlation (rc = 0.479) observed between these methods. The 95% limits of individual agreement between BAI and ADP ranged from -5.769% to 16.036%, with BAI exhibiting an average positive bias of 5.13% compared to the reference method. For each studied variable, BAI exhibited a systematic bias, as evidenced by a tendency for low BF% values to be overestimated.

Conclusion: For Brazilian patients with severe obesity, BAI does not provide an accurate estimate of BF%.

No MeSH data available.


Related in: MedlinePlus