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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Ann Hum Biol. 2016 Apr 27;44(2):108–120. doi: 10.3109/03014460.2016.1168867

Table 3.

Two and Four Skinfold Prediction Models

Variable Coefficient Std. Err. p 95% Confidence Interval adj R2 RMSE
2 Skinfold Prediction Equations

Non-African American Males Log Sum 2 SF 13.12 0.38 <0.001 (12.37, 13.87) 0.81 2.45
Log Height −15.46 1.80 <0.001 (−18.98, −11.94)
Tanner 4–5 −13.66 33.92 0.69 (−80.13, 52.82)
Tanner 4–5 x Log Height 2.19 6.61 0.74 (−10.77, 15.15)
Intercept 64.58 8.67 <0.001 (47.59, 81.57)

African American Males Log Sum 2 SF 14.73 0.55 <0.001 (13.66, 15.80) 0.86 2.56
Log Height −10.55 2.13 <0.001 (−14.73, −6.37)
Tanner 4–5 75.72 37.37 0.043 (2.48, 148.96)
Tanner 4–5 x Log Height −15.40 7.32 0.035 (−29.73, −1.06)
Intercept 34.82 9.98 <0.001 (15.25, 54.38)

All Males - Simplified Equation (no Tanner Stage required) Log Sum 2 SF 14.30 0.55 0.0000 (13.21, 15.38) 0.82 2.64
Log Height −20.66 1.45 0.0000 (−23.5, −17.81)
African American −1.09 0.41 0.0070 (−1.89, −0.30)
Intercept 86.44 6.95 0.0000 (72.81, 100.06)

Females Log Sum 2 SF 13.95 0.63 <0.001 (12.72, 15.18) 0.74 3.00
Log Height −18.09 1.80 <0.001 (−21.61, −14.57)
African American −1.77 0.41 <0.001 (−2.56, −0.97)
Intercept 77.17 8.12 <0.001 (61.26, 93.08)

4 Skinfold Prediction Equations

Males Log Sum 4 SF 12.41 0.49 <0.001 (11.45, 13.38) 0.85 2.41
Log Height −16.90 2.05 <0.001 (−20.93, −12.88)
Tanner 4–5 −1.84 0.64 0.004 (−3.09, −0.59)
African American −8.46 2.74 0.002 (−13.83, −3.10)
Afr Amer X Log Sum 4SF 2.27 0.83 0.006 (0.65, 3.89)
Intercept 66.78 9.81 <0.001 (47.56, 86.00)

Males - Simplified Equation (no Tanner Stage required) Log Sum 4 SF 12.74 0.51 <0.001 (11.74, 13.74) 0.84 2.47
Log Height −21.47 0.99 <0.001 (−23.41, −19.53)
African American −7.90 2.84 0.005 (−13.47, −2.34)
Afr Amer X Log Sum 4SF 2.09 0.86 0.015 (0.41, 3.77)
Intercept 87.82 4.75 <0.001 (78.51, 97.14)

Females Log Sum 4 SF 13.99 0.49 <0.001 (13.03, 14.96) 0.76 2.83
Log Height −21.42 1.78 <0.001 (−24.92, −17.92)
African American −34.61 14.25 0.015 (−62.54, −6.67)
Afr Amer X Log Height 6.73 2.88 0.02 (1.08, 12.37)
Intercept 85.65 8.75 <0.001 (68.50, 102.80)
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