MORGAM_RH_HYSTER

The RH_HYSTER variable is defined using the MORGAM variables REMENOP and MENOP, and the CHANCES variable SEX.

REMENOP
If you have stopped having monthly periods was it because of
1 = hysterectomy, alone
2 = hysterectomy, oophorectomy unknown
3 = bilateral oophorectomy with or without hysterectomy
4 = menopause
8 = irrelevant (MENOP on Form 20 = 1, 2 or 8)
9 = insufficient data

MENOP
Are you still having monthly periods?
1 = yes, as usual
2 = yes, but irregularly
3 = no
8 = not relevant
9 = insufficient data

CHANCES:RH_HYSTER
Has the woman ever had a hysterectomy?
0 = No
1 = Yes
9 = Missing/insufficient data. Also code 9 if SEX=1 (for males)

If SEX = 2 (FEMALE), the following rule is used to define RH_HYSTER:

"(IL)" in the table indicates an illogical combination of MENOP and REMENOP. Records with such coding are extremely rare in the MORGAM data.

If SEX = 1 (MALE), 9 is coded for RH_HYSTER.

ESTHER_RH_HYSTER

RH_HYSTER = p_hyst;
if RH_Hyster = . then RH_Hyster = 9;
if sex = 1 then RH_HYSTER = 9;

Source of p_hyst is participant's questionnaire at baseline and 2-year follow-up, 5-year follow-up and 8-year follow-up questionnaires.

p_hyst is derived from F25UTOP at baseline and if in the follow-up questionnaire the respondent also reported a hysterectomy before the date of inclusion in the study, then it was also included in the p_hyst variable.

EPIC_RH_HYSTER

The EPIC variable HYSTER was used for the production of RH_HYSTER according to the following definition and rule.

EPIC var definition(s):
HYSTER: EPIC elderly variable showing hysterectomy (1=yes, 0=no)

Coding rule:
Variable RH_HYSTER shows if the person had undergone hysterectomy and is identical to HYSTER.

Coding rule in STATA:
-gen RH_HYSTER =  HYSTER

-replace RH_HYSTER = 9 if RH_HYSTER==.