Derivation
variable: dpt1vc (table[s]: cen_individ, crs_bfup, crs_birth, crs_cenm)
variable: dpthh1vc (table[s]: css_sei_all)
variable: vhc2 (table[s]: crs_birth, css_sei_all, gp_va, tmt_tmtv, ves_vese)
variable: vcentre (table[s]: crs_cenm)
When variable is collected with DPT & HH together they are split:
foreach var in yn date datex vc {
forvalues x=1/3 {
gen dpt`x'`var'=dpthh`x'`var'
gen hh`x'`var'=dpthh`x'`var'
drop dpthh`x'`var'
}
}