J Med Assoc Thai 1998; 81 (12):931

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Thiamin and Riboflavin Status of Medical Inpatients
Songchitsomboon S Mail, Komindr S , Puchaiwatananon O

Thiamin status was assessed by erythrocyte transketolase actiVIty (ETKA) and thiamin
pyrophosphate effect (TPPE) and riboflavin status by erythrocyte glutathione reductase activity
(EGRA) and activity coefficient (AC) in 165 medical inpatients in Ramathibodi Hospital. Based
on TPPE >15 per cent, 9 per cent of the medical inpatients had thiamin depletion. Most of them
were patients with renal, cardiovascular, hematological and infectious diseases. Based on AC
≥ 1.2, 17 per cent of these inpatients had riboflavin depletion. Most of them were patients with
pulmonary, cardiovascular and hematological diseases. Only one patient with pulmonary disease
had both thiamin and riboflavin depletion. The proportion of thiamin depletion (2/37) in subjects
with thiamin supplementation (mean 32.4, median 6, mode 2 md/d) tended to be less than
those without (9/98). But, subjects with riboflavin supplementation (mean 3.3, median 4, mode I
md/d) had the proportion of riboflavin depletion (0/31) significantly (Z-test, p< 0.005) lower than
without supplementation (23/104). The data suggested that although the usual dose of vitamin
supplementation in medical inpatients is beneficial thiamin depletion can still be present in
catabolic patients.

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