Derivation
variable: hipcu (table[s]: css_sei)
variable: hip_op1 (table[s]: gap_combined)
variable: hip (table[s]: ncd_combined)
variable: hipcuf/hipcus (table[s]: sts_fup, sts_stsf, sts_stsp, arkk_arkq, kduk_kduq, phdk_phdq)
Hip circumference from ARK, STS, KDU and PHD were collected twice so average of the 2 readings is calculated. All hip circumference variables from the various tables are in cm so if necessary are renamed to hipcu