Anthropometrics🔗
| Name | Anthropometrics (Height/Weight/Head Circumference) |
| Table Name | ph_ch_anthro |
| Construct | Growth |
| Study Visits | V02, V03, V04, V06, V08 |
| Type | In-person Behavioral observation (Child on Self; 5 min) |
| Quality Control | Monitor data dashboard for variable missingness, possible coding errors, and data consistency. |
Range checks were performed to identify and exclude extreme out-of-range values. Values outside of the following valid ranges were converted to 'n/a'. Note that these ranges are not age-specific, i.e. the same ranges were used for all visits.
- Average length (
ph_ch_anthro_len_001__03): Valid range 30–130 cm - Head circumference (
ph_ch_anthro_head_001__03): Valid range 25–55 cm - Average weight (
ph_ch_anthro_wei_001__03): Valid range 0.5–30 kg
Sex-specific birthweight for gestational age centiles and z-scores will be calculated in future data releases using Intergrowth curves (Villar et al. 2014). In the meantime, data users can use these growth curves or ones of their choice to calculate centiles and small/large for gestational age variables.
Instrument Details🔗
Anthropometrics is a standard direct measure of child growth, including height or length (in cm), weight (in kg), and head circumference (cm). In older children (including visits V08 and V10-V14), it will also include abdominal circumference (cm).
Anthropometric Z-Score and Percentile Calculations
Age-based z-scores and percentiles for growth measurements were calculated for V02 onward using the WHOanthro R package. Calculations are based on estimated date of delivery, inherently adjusting for pre-mature birth. WHO growth charts were used for participants <2 years old, and CDC growth charts were used for participants 2 years and older.
Villar, J., Cheikh Ismail, L., Victora, C. G., Ohuma, E. O., Bertino, E., Altman, D. G., Lambert, A., Papageorghiou, A. T., Carvalho, M., Jaffer, Y. A., Gravett, M. G., Purwar, M., Frederick, I. O., Noble, A. J., Pang, R., Barros, F. C., Chumlea, C., Bhutta, Z. A., Kennedy, S. H., & International Fetal and Newborn Growth Consortium for the 21st Century (INTERGROWTH-21st). (2014). International standards for newborn weight, length, and head circumference by gestational age and sex: the Newborn Cross-Sectional Study of the INTERGROWTH-21st Project. Lancet, 384(9946), 857–868. https://doi.org/10.1016/S0140-6736(14)60932-6