However, there were no differences between the groups regarding parity, infertility problems, or obstetric outcome.
Regarding parity, 28%% were nulliparous or never had a vaginal delivery and 72%% had at least one vaginal delivery.
Regarding parity, 49 were nulliparous or never had a vaginal delivery and 158 had at least one vaginal delivery [12].
Prior reports are in agreement with our findings regarding parity.
There are inconsistent results regarding parity and stomach cancer risk.
There were no differences in the follow-up rate regarding parity or child's sex.
Our observations regarding parity and its negative relationship with caesarean or operative delivery has been described before [ 31– 31].
There were no differences between BMI groups regarding parity, age at first birth, number of children, or age at menopause.
Our study regarding parity is consistent with results from the Million Women Study Cohort conducted in United Kingdom, which included substantial female oesophageal cancer cases (Green et al, 2012b).
At the time of collection of these tissue samples no information was available regarding parity history, menstrual cycle status and oral contraception use.
