Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1993-1-13
pubmed:abstractText
Register and census data for complete cohorts of Norwegian men and women born between 1935 and 1969 have been used to examine the relationship between reproductive factors and the incidence of colorectal cancer. Among 1.1 million men and 1.1 million women under observation, 491 male and 859 female cases of colorectal cancer were diagnosed during the period of follow-up. Our hazard model estimates clearly show that in these young cohorts, women with 2 or more children run a lower risk of having a malignant tumor in the cecum or ascending colon than do other women of the same age and in the same birth cohort. No association with parity is found with respect to cancer in the transverse or descending colon, whereas a downward trend in the effect estimates, followed by an upturn, appears for the rectum, sigmoid colon and rectosigmoid junction. Such correlations, which also hold when we control for education and place of residence, are not found for men. The observed relationship between parity and cancer incidence is not likely to be exclusively explained by life-style differentials. Presumably, there is a biological effect of the number of pregnancies and deliveries, net of age at first birth and other reproductive factors, on the development of colorectal cancer.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0020-7136
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
56-61
pubmed:dateRevised
2007-7-24
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
A sub-site-specific analysis of the relationship between colorectal cancer and parity in complete male and female Norwegian birth cohorts.
pubmed:affiliation
Central Bureau of Statistics, Oslo, Norway.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't