Table 1 Formulas for estimating stature from segmental measures

Equations for estimation of stature from segmental measures

Segmental measure

Equation to estimate stature (S) (cm)

Children with CP (age: birth –12 years) ⁴

Upper arm length, UAL

S=(4.35 × UAL)+21.8

Tibial length, TL

S=(3.26 × TL)+30.8

Knee height, KH

S=(2.69 × KH)+24.2

Estimation of stature (S) from knee height (KH) in children aged 6–18 years

Race and gender

Equation to estimate stature (cm)

Derived in typically developing children, validity demonstrated in a small group of children with CP ^{5, 6}

White males

S=(2.22 × KH)+40.54

Black males

S=(2.18 × KH)+39.6

White females

S=(2.15 × KH)+43.21

Black females

S=(2.02 × KH)+46.59

Estimation of height (H) from ulna length (U)

Gender

Equation to estimate height (cm)

Derived in typically developing children aged 5–19 years. Not validated in children with CP. Performed better in typically developing children than prior ulnar equations, which had shown validity in CP (construct validity) ³

Males

H=4.605U+1.308 A+28.003 (A=age)

Females

H=4.459U+1.315 A+31.485 (A=age)