TY  - JOUR
A1  - Mumm, Rebekka
A1  - Hermanussen, Michael
A1  - Scheffler, Christiane
T1  - voice break as the marker of biological age
JF  - Acta paediatrica : nurturing the child
N2  - Aim: We aimed to develop the first references for body height, body weight and body mass index (BMI) for boys based on the individual developmental tempo with respect to their voice break status. Methods: We re-analysed data from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS study) on body height, body weight and body mass index based on the voice break, or mutation, in 3956 boys aged 10-17 years. We used the LMS method to construct smoothed references centiles for the studied variables in premutational, mutational and postmutational boys. Results: Body height, body weight and BMI differed significantly (p < 0.001) between the different stages of voice break. On average, boys were 5.9 cm taller, 5.8 kg heavier and had a 0.7 kg/m(2) higher BMI with every higher stage of voice break. Currently used growth references for chronological age in comparison with maturity-related references led to an average of 5.4% of boys being falsely classified as overweight.
KW  - Body mass index
KW  - Developmental tempo
KW  - Growth reference values
KW  - Overweight
KW  - Voice break
Y1  - 2016
U6  - https://doi.org/10.1111/apa.13488
SN  - 0803-5253
SN  - 1651-2227
VL  - 105
SP  - e459
EP  - e463
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Mumm, Rebekka
A1  - Scheffler, Christiane
A1  - Hermanussen, Michael
T1  - Developing differential height, weight and body mass index references for girls that reflect the impact of the menarche
JF  - Acta paediatrica : nurturing the child
N2  - Aim Growth is both a matter of amplitude and tempo. We aimed to develop references for body height, body weight and body mass index (BMI) with respect to tempo of maturity. Methods Data obtained from the German KiGGS study (2003-2006) on body height, body weight and presence or absence of the menarche were re-analysed in 3776 girls, aged 10-17years. We developed smoothed centiles for BMI-, body-height- and body-weight-for-age using the LMS method for premenarcheal and postmenarcheal girls. Results Body height, body weight and BMI differed significantly between premenarcheal and postmenarcheal girls. On average, postmenarcheal girls aged 11-17years were 5.3cm taller and 9.7kg heavier, and their BMI was 2.9kg/m2 higher than in premenarcheal girls of the same calendar age. Conclusion Adolescent BMI rises with calendar age and biological age. New reference charts for adolescent girls aged 10-18years were generated to be inserted into the currently used references to avoid misclassifying underweight and overweight pubertal girls.
KW  - Body mass index
KW  - Body mass index reference values
KW  - Menarche
KW  - Obesity
KW  - Overweight
Y1  - 2014
U6  - https://doi.org/10.1111/apa.12625
SN  - 0803-5253
SN  - 1651-2227
VL  - 103
IS  - 7
SP  - e312
EP  - e316
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -