EPIC_OSTEOP_AGE_FU

Variable OSTEOP_AGE_FU shows age at diagonis of incident of osteoporosis recorded during follow up. Is created from the variables and coding rules written below.

Var definitions:

A_OSTEOP: EPIC elderly Greece variable showing age at diagnosis (in years) of osteoporosis

AGE_RECR_TR: EPIC elderly Greece variable showing age at recruitment

OSTEOP_FU: self reported diagnosis of osteoporosis recorded during follow up

Coding rule:
Variable OSTEOP_AGE_FU is identical to A_OSTEOP, for the self reported cases of osteoporisis diagnosis during follow up.

Furthermore OSTEOP_AGE_FU is coded as missing, for the prevalent osteoporosis cases.

Coding rule in STATA:

-gen OSTEOP_AGE_FU= A_OSTEOP if OSTEOP_FU==1

-replace OSTEOP_AGE_FU=. if AGE_RECR_TR>=OSTEOP_AGE_FU & OSTEOP_AGE_FU~=.