Research ArticleOriginal Research

A Comparison of Transcutaneous and Total Serum Bilirubin in Newborn Hispanic Infants at 35 or More Weeks of Gestation

Karyn B. Kolman, Kathleen M. Mathieson and Carlos Frias
The Journal of the American Board of Family Medicine May 2007, 20 (3) 266-271; DOI: https://doi.org/10.3122/jabfm.2007.03.060172

Article Figures & Data

Figures

  • Figure 1.
    Figure 1.

    Total serum bilirubin versus transcutaneous bilirubin measurements. N = 192 comparisons. The line of equality (TcB = TSB) is represented by the dotted line. The equation for the least squares best fit line is TSB = .271 + .974 (TcB), represented by the solid line.

  • Figure 2.
    Figure 2.

    Error distribution plot of total serum bilirubin and transcutaneous bilirubin. Mean difference between TSB and TcB, plotted against mean of TSB and TcB.

Tables

  • Table 1.

    Sample Characteristics

    CharacteristicMean (SD) or n (%)
    Gestational age (weeks)39 (1.5)
    Birth weight (grams)3368 (489.4)
    Age at time of measurements (hours)40 (13.4)
    Serum bilirubin for age
        below 75th percentile120 (62.5%)
        75th to 95th percentile60 (31.3%)
        above 95th percentile12 (6.3%)
  • Table 2.

    Predictive Indices Using >95th Percentile TSB and ≥75th Percentile TcB*

    TSB >95th PercentileTSB ≤95th Percentile
    TcB
        ≥75th percentile1261
        <75th percentile0119
    Total (N = 192)12180

    • * For all values, sensitivity = 100%, specificity = 66.1%, positive predictive value = 16.4%, and negative predictive value = 100%.

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