TROMSO_RH_A_1PERC

Name: RH_A_1PERC

Description and values: Age at first menstrual in years.

Code 9999 for insufficient data.

Local variable explanation:

*MENARCHE_AGE_T4 : *How old were you when you started menstruating?

SAS code:

RH_A_1PERC=MENARCHE_AGE_T4;

If SEX EQ 1 or MENARCHE_AGE_T4 EQ . then RH_A_1PERC=9999;      

NSWEDEN_RH_A_1PERC

RH_A_1PERC=V2;

IF V2=. THEN RH_A_1PERC=9999;

V2 is the ma_V2 in the variable list

ESTHER_RH_A_1PERC

RH_A_1PERC=F20MENST;
if RH_A_1PERC=. then RH_A_1PERC=9999;
if sex = 1 then RH_A_1PERC = 9999;

Source of is participant's questionnaire at baseline

EPIC_RH_A_1PERC

The EPIC variable A_1PER was used for the production of RH_A_1PERC according to the following definition and rule.

EPIC var definition(s):
A_1PER: EPIC elderly variable showing age at 1st menstrual period

Coding rule:
Variable RH_A_1PERC shows age at 1st menstrual period and is identical to A_1PERC.

Coding rule in STATA:
-gen RH_A_1PERC = A_1PER

-replace RH_A_1PERC=9999 if RH_A_1PERC==.