Validity of new child-specific thoracic gas volume prediction equations for air-displacement plethysmography

BMC Pediatrics

Table 2 Thoracic gas volume and percent body fat by group and gender

	European American	African American	European
Girls	N = 42	N = 23	N = 34
Measured TGV	2.12 ± 0.55	1.96 ± 0.43	2.79 ± 0.69
Percent body fat (measured TGV)	26.8 ± 9.0	23.5 ± 8.8	18.4 ± 8.1
Predicted TGV by the adult equation (L)	2.71 ± 0.42 *	2.67 ± 0.49 **	3.20 ± 0.48**
Percent body fat (predicted adult TGV)	29.3 ± 9.3	26.8 ± 8.8	20.1 ± 8.3
TGV by the child-specific equation (L)	2.22 ± 0.46	2.19 ± 0.51	2.83 ± 0.73
Percent body fat (child-specific TGV)	27.1 ± 9.5	24.3 ± 9.1	18.5 ± 8.6
Boys	N = 18	N = 20	N = 53
Measured TGV	2.24 ± 0.86	2.09 ± 0.49	4.03 ± 1.00
Percent body fat (measured TGV)	27.2 ± 10.2	25.2 ± 11.2	12.5 ± 5.6
Predicted TGV by the adult equation (L)	2.56 ± 0.70	2.34 ± 0.60	3.80 ± 0.66
Percent body fat (predicted adult TGV)	28.6 ± 10.7	26.2 ± 11.0	12.2 ± 5.9
TGV by the child-specific equation (L)	2.29 ± 0.75	2.07 ± 0.58	3.82 ± 1.04
Percent body fat (child-specific TGV)	27.4 ± 10.4	25.0 ± 11.0	11.8 ± 5.8

Data are mean ± SD.
Mean differences were assessed using ANOVA and Tukey's test for multiple comparisons.
* p < 0.05 and is significantly different from the measured value.
** p < 0.001 and is significantly different from the measured value.

ISSN: 1471-2431