[The stability of the microalbuminuria numbers in relation to their reading time and mode of preservation].
OBJECTIVE
To evaluate the stability of microalbuminuria figures in urine samples of diabetic patients, in terms of how the samples are kept, and the time between taking and reading.


METHODS
Descriptive, prospective and observational study.


METHODS
Primary care. Teaching health centre, Burgos.


METHODS
40 type-2 diabetics had their urinary excretion of albumin measured in 91 first-in-the-morning urine samples with Micral Test II reactive strips.


METHODS
Samples were analysed the day of their collection, then protected from light and kept at +4 degrees C, with further readings at 24, 48 and 72 hours and at 7, 14, 21 and 28 days after collection.


RESULTS
49 (53.84%) of the 91 samples taken did not vary over the 28 days of the study. In the first three days, there were 64 with unvaried measurements (70.2%). Friedman's test showed p = 0.905. > 93% of samples positive at the beginning remained positive all the time; > 83% of samples negative at the beginning remained negative. Concordance observed was > 90%; kappa index > 80%.


CONCLUSIONS
Collection of first urine samples in the morning, stored at +4 degrees C in a fridge and protected from light, did not significantly alter the result of the reading for 4 weeks. Such samples are useful in order to aid study of the albumin excretion rate using Micral Test II reactive strips.
Centro de Salud San Agustín, Unidad Docente de Medicina Familiar y Comunitaria de Burgos.
M L
ML
González Castro
J
J
Sagredo Pérez
R
R
Cebrecos Tamayo
O
O
Enríquez Dueñas
R A
RA
de Baranda
J
J
Cordero Guevara
D000368:Aged; D000419:Albuminuria / Q000652:urine*; D016001:Confidence Intervals; D003924:Diabetes Mellitus, Type 2 / Q000652:urine; D003928:Diabetic Nephropathies / Q000652:urine; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011933:Reagent Kits, Diagnostic / Q000706:statistics & numerical data; D013048:Specimen Handling / Q000379:methods* / Q000706:statistics & numerical data; D013696:Temperature; D013997:Time Factors
D011933:Reagent Kits, Diagnostic
Estabilidad de las cifras de microalbuminuria en relación con el tiempo de lectura y el modo de conservación.