Urinary Excretion of Creatinine of Children under Different Nutritional Conditions

Arroyave, Guillermo; Wilson, Dorothy

doi:10.1093/ajcn/9.2.170

Cited by 30 publications

(8 citation statements)

References 9 publications

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“…We adjusted the process based on the creatinine concentration in all three methods because of its consistent excretion in urine [17][18][19]. If using SU to estimate 24-h urine collection as a substitution of a method, the agreement tests between the two methods need to be accepted.…”

Section: Discussionmentioning

confidence: 99%

Assessment and validation of spot urine in estimating the 24-h urinary sodium, potassium, and sodium/potassium ratio in Chinese adults

Bai

et al. 2019

J Hum Hypertens

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The commonly used methods of estimating the 24-h urinary sodium (UNa) and urinary potassium (UK) from spot urine (SU) are the Kawasaki method (K-method), INTERSALT method (I-method), and Tanaka method (T-method), but the method that is suitable for use in the general Chinese population is still uncertain. We aimed to assess and validate these methods in estimating the 24-h UNa and UK using SU samples in Chinese adults. We studied 1428 individuals aged 18-69 years using SU and 24-h urine samples. For the K-method, I-method, and T-method, the Pearson correlation coefficients of the 24-h UNa were 0.35, 0.35, and 0.33 (all p < 0.01), and the intraclass correlation coefficients (ICC) were 0.34, 0.26, and 0.26 (all p < 0.01), respectively. The estimated 24-h UK using the K-method and T-method had correlation coefficients of 0.36 and 0.39 (all p < 0.01) and ICCs of 0.31 and 0.27 (all p < 0.01). The mean bias for the K-method in estimating the 24-h UNa and UK were the least biased among these methods. The bias between the 24-h urine Na/K ratio and the spot urinary Na/K ratio by the Bland-Altman method was −0.22. These methods for estimating the 24-h UNa and UK from SU were inadequate at the population level in Zhejiang Province, although the K-method showed the least bias among these methods. The spot urine Na/K ratio may be a useful and alternative method for 24-h urine collection for the estimation of the urinary Na/K ratio in the Chinese population.

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Section: Discussionmentioning

confidence: 99%

Assessment and validation of spot urine in estimating the 24-h urinary sodium, potassium, and sodium/potassium ratio in Chinese adults

Bai

et al. 2019

J Hum Hypertens

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“…Even though the partition cup is available to collect the 24 h urine (Tochikubo et al 1983), it is usual for some portions to be missed. Creatinine excretion in urine is considered to be fairly constant (Arroyave & Wilson 1961;Pollack 1970;Liu et al 1978;Kawasaki et al 1984). We have developed an equation to predict adult 24HUc,V based on age, bodyweight and height by sex (Kawasaki et al 1985(Kawasaki et al , 1991.…”

Section: Discussionmentioning

confidence: 99%

A Simple Method for Estimating 24 H Urinary Sodium and Potassium Excretion From Second Morning Voiding Urine Specimen in Adults

Kawasaki

Itoh

Uezono

et al. 1993

Clin Exp Pharma Physio

447

518

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1. An assessment was made of the extent sodium (Na) and potassium (K) intake can be estimated from Na, K and creatinine (Cr) content of a second morning voiding urine (SMU) specimen collected within 4 h after the first voiding upon awakening but before breakfast in 159 clinically healthy, free-living individuals (20-79 years). The SMU and the rest of 24 h urine specimens for a 3-5 day period were collected. 2. The following equations for estimating 24 h urinary Na (24HUNaV) and K (24HUKV) excretions were developed, and the accuracy and the reliability of these equations were evaluated. Estimated value of 24HUNaV (mEq/day) = 16.3 square root of XNa; estimated value of 24HUKV (mEq/day) = 7.2 square root of XK, where XNa (or XK) = SMUNa (or SMUK)/SMUCr x predicted 24 h urinary Cr excretion. 3. Highly statistically significant correlations were detected between the values estimated and measured for both Na (r = 0.728, P < 0.001, n = 159) and K (r = 0.780, P < 0.001, n = 159). 4. These equations were applied to Group 1 subjects, who collected the urine for a single day, and to Group 2, for 3 days. The correlation coefficients between the values estimated and measured for Na and K were 0.531 and 0.443 in Group 1, and 0.821 and 0.590 in Group 2, respectively. No statistically significant differences were observed. 5. The SMU specimens provide a satisfactory alternative to both 24HUNaV and 24HUKV in adults for extensive epidemiological surveys but also for clinical application.

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“…This ratio, therefore, may be an index of recent protein intake and not of the state of protein depletion. Other indexes suggested to detect protein depletion are urinary creatinine excretion [6,8] and hydroxyproline in the urine [14,26].…”

Section: Discussionmentioning

confidence: 99%

Urinary free amino acids pattern in protein-energy malnourished sudanese children

Osman

1981

Res. Exp. Med.

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The urinary free amino acid pattern in a morning urine sample of Sudanese children suffering from Kwashiorkor and marasmus were determined before and during the course of treatment up to the 2nd week. The urinary amino acid/total urinary N (3.62) was found to be almost constant for Kwashiorkor patients, while the mean for marasmic patients was found to be 27. The concentration of leucine, valine, phenylalanine, methylhistidine, lysine, hydroxylysine and beta-amino-isobutyric acid was elevated in marasmic children, while the concentration of most of these amino acids was at a lower level in Kwashiorkor patients. The significance of these differences was discussed in relation to the biochemical detection of these deficiencies in field nutrition surveys.

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Urinary Excretion of Creatinine of Children under Different Nutritional Conditions

Cited by 30 publications

References 9 publications

Assessment and validation of spot urine in estimating the 24-h urinary sodium, potassium, and sodium/potassium ratio in Chinese adults

Assessment and validation of spot urine in estimating the 24-h urinary sodium, potassium, and sodium/potassium ratio in Chinese adults

A Simple Method for Estimating 24 H Urinary Sodium and Potassium Excretion From Second Morning Voiding Urine Specimen in Adults

Urinary free amino acids pattern in protein-energy malnourished sudanese children

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