Approximated Fenton CSD Values (M, S_upper, S_lower)

Approximated Fenton CSD values: approximated reference values derived from printed Fenton (2025) charts, for weight, length, and head circumference by sex and gestational age in days. Contains the median (M), S_upper, and S_lower, where S_upper x M is half the distance between the median and +2 SD and S_lower x M is half the distance between the median and -2 SD. Used with the CSD method for z-score calculation. These are approximations derived from the charts, not values published by the Fenton authors. See vignette("wrapper"), "Gestational-age reference values".

fenton2025_ms_lookup_smoothed.csv

Used in function cleangrowth() for GA correction (Step 2b).

References

Fenton TR, Elmrayed S, Alshaikh BN. Fenton Third-Generation Growth Charts of Preterm Infants Without Abnormal Fetal Growth: A Systematic Review and Meta-Analysis. Paediatr Perinat Epidemiol. 2025 Aug;39(6):543-555. doi:10.1111/ppe.70035 . Epub 2025 Jun 19. PMID: 40534585; PMCID: PMC12391854.