Table 3.
Mean values of [13C]UBT DOBs and HpSA Plus ODs for Brazilian and Peruvian children who had concordant results between the two testsa
| Result | Mean value ± SD for group or comparison |
|||||
|---|---|---|---|---|---|---|
| Country |
Gender |
|||||
| Peru | Brazil | P value | Boys | Girls | P value | |
| UBT DOB | ||||||
| Negative | 1.37 ± 1.63 | 1.36 ± 1.30 | 0.38 | 1.30 ± 1.36 | 1.48 ± 1.67 | 0.23 |
| Positive | 18·87 ± 23.36 | 25.20 ± 28.24 | 0.05 | 18·37 ± 21.44 | 19.45 ± 25.38 | 0.52 |
| HpSA OD | ||||||
| Negative | 0.07 ± 0.02 | 0.07 ± 0.03 | 0.35 | 0.07 ± 0.03 | 0.07 ± 0.02 | 0.54 |
| Positive | 0.76 ± 0.99 | 0.78 ± 0.93 | 0.26 | 0.77 ± 1.06 | 0.76 ± 1.03 | 0.85 |
a
DOB, delta over baseline, mean ± SD (‰); OD, optical density, mean ± SD; cutoff values adopted were those recommended by the manufacturers (n = 1,255). Data were analyzed by using Student's t test after natural log transformation.