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iqr
ric

iqr = 75th percentile – 25th percentile
iqr = 75° percentil – 25° percentil

median baseline cd4+ cell count, cells/mm3 (iqr)
mediana del recuento de células cd4+ al inicio, celúlas/mm3 (iqr)

median baseline hiv-1 rna, log10 copies/ml (iqr)
mediana de arn del vih-1 al inicio, log10 copias/ml (iqr)

continuous variables were expressed as the mean and standard deviation or the median and interquartile range (iqr, 25-75) when the variable was not distributed normally.
las variables continuas se describieron mediante la media y la desviación estándar o la mediana y el intervalo intercuartílico (iic25-75) cuando la variable no se distribuía normalmente.