. Author manuscript; available in PMC: 2013 Nov 13.

Published in final edited form as: Int J Body Compos Res. 2011 Mar 1;9(1):1–10.

Table 4.

Prediction equations for total body water values obtained by using deuterium dilution during trimesters 1, 2, and 3 and 10-weeks postpartum¹.

Model type	Time point	R²
1st Trimester
Ht²/R₅₀ only	TBW_Deut = 5.31 + 0.65 Ht²/R₅₀	0.653
Anthropometry only	TBW_Deut = −7.72 + 0.25 Wt + 0.15 Ht + 0.34 BMI − 0.27 MUAC – 0.09 TSF	0.634
Anthropometry + Ht²/R₅₀	TBW_Deut = −41.41 − 0.28 Wt + 0.32 Ht + 1.36 BMI − 0.50 MUAC – 0.06 TSF + 0.46 Ht²/R₅₀	0.750
Full model	TBW_Deut = −35.34 + 0.45 Ht²/R₅₀ + 0.31 Ht – 0.44 MUAC −0.11
	Age – 0.20 gestation + 0.61 HIVpos + 1.22 BMI + 0.06 TSF −0.24 Wt	0.769
2nd Trimester
Ht²/R₅₀ only	TBW_Deut = 9.67 + 0.54 Ht²/R₅₀	0.637
Anthropometry only	TBW_Deut = 11.86 + 0.44 Wt + 0.03 Ht − 0.32 BMI − 0.05 MUAC – 0.10 TSF	0.672
Anthropometry + Ht²/R₅₀	TBW_Deut = 3.72 + 0.25 Wt + 0.06 Ht − 0.16 BMI − 0.12 MUAC – 0.04 TSF + 0.30 Ht²/R₅₀	0.748
Full model	TBW_Deut = −48.58 + 0.34 Ht2/R50 + 0.42 Ht – 0.40 MUAC − 0.03
	Age – 0.13 gestation + 1.13 HIVpos + 1.19 BMI + 0.05 TSF − 0.28 Wt	0.771
3rd Trimester
Ht²/R₅₀ only	TBW_Deut = 15.77 + 0.42 Ht2/R50	0.489
Anthropometry only	TBW_Deut = 43.82 + 0.73 Wt − 0.18 Ht − 0.99 BMI − 0.04 MUAC – 0.11 TSF	0.862
Anthropometry + Ht²/R₅₀	TBW_Deut = 42.49 + 0.70 Wt − 0.17 Ht − 0.97 BMI − 0.05 MUAC – 0.09 TSF + 0.04 Ht²/R₅₀	0.864
Full model	TBW_Deut = 31.05 + 0.58 Wt − 0.76 BMI – 0.09 TSF – 0.08 Ht + 0.02 MUAC – 0.06
	Age + 0.06 Ht2/R50 −0.04 gestation – 0.16 HIVpos	0.851
10-weeks postpartum
Ht²/R₅₀ only	TBW_Deut = 2.00 + 0.70 Ht²/R₅₀	0.665
Anthropometry only	TBW_Deut = 2.42 + 0.30 Wt − 0.06 Ht + 0.26 BMI − 0.15 MUAC – 0.11 TSF	0.741
Anthropometry + Ht²/R₅₀	TBW_Deut = −15.20 + 0.004 Wt − 0.12 Ht + 0.63 BMI − 0.18 MUAC – 0.01 TSF + 0.42 Ht²/R₅₀	0.850
Full model	TBW_Deut = −9.42 + 0.07 Wt + 0.40 Ht2/R50 −0.06
	Age + 0.09 Ht + 0.47 BMI – 0.14 MUAC – 0.04 TSF −0.04 HIVpos	0.855

Based on linear regression models