Sitting Height to Standing Height Ratio Reference Charts for Children in the United States.

TitleSitting Height to Standing Height Ratio Reference Charts for Children in the United States.
Publication TypeJournal Article
Year of Publication2020
AuthorsHawkes CPatrick, Mostoufi-Moab S, McCormack SE, Grimberg A, Zemel BS
JournalJ Pediatr
Date Published2020 Jun 21

OBJECTIVE: To create reference charts for Sitting height to standing height ratio (SitHt/Ht) for children in the United States, and to describe the trajectory of SitHt/Ht during puberty.

STUDY DESIGN: This was a cross-sectional study using data from the 1988-1994 National Health and Nutrition Examination Survey III, a strategic random sample of the United States population. Comparison between Non-Hispanic White (NHW), Non-Hispanic Black (NHB) and Mexican American groups was performed by analysis of variance (ANOVA) to determine if a single population reference chart could be used. ANOVA was used to compare SitHt/Ht in pre-, early and late puberty.

RESULTS: NHANES III recorded sitting height and standing height measurements in 9,569 children aged 2 to 18 years of NHW (n=2,715), NHB (n=3,336), and Mexican American (n=3,518) ancestry. NHB children had lower SitHt/Ht than NHW and Mexican American children throughout childhood (p < 0.001). In both sexes, SitHt/Ht decreased from prepuberty to early puberty and increased in late puberty. Sex-specific percentile charts of SitHt/Ht vs age were generated for NHB and for NHW and Mexican American youth combined.

CONCLUSIONS: SitHt/Ht assessment can detect disproportionate short stature in children with skeletal dysplasia, but age-, sex- and population-specific reference charts are required to interpret this measurement. NHB children in the United States have significantly lower SitHt/Ht than other children, which adds complexity to interpretation. We recommend the use of standardized ancestry-specific reference charts in screening for skeletal dysplasias and have developed such charts in this study.

Alternate JournalJ. Pediatr.
PubMed ID32579888