Yes, Jonathan. Please consider the following examples:

(1)
There were 725,000 women-years of follow up, with 1935 cases of breast cancer among postmenopausal women

http://www.jr2.ox.ac.uk/bandolier/band24/b24-2.html

(2)
Endometrial adenocarcinoma incidence rate per 1,000 women-years:2.20 for Nolvadex vs 0.71 for placebo
Uterine sarcoma incidence rate per 1,000 women-years: 0.17 for Nolvadex vs 0.0 for placebo
Stroke incidence rate per 1,000 women-years: 1.43 for Nolvadex vs 1.00 for placebo
Pulmonary embolism incidence rate per 1,000 women-years: 0.75 for Nolvadex vs 0.25 for placebo

(http://www.breastcancerprofessional.com/contents/public/faq/...

Glad to be helpful, if I was!

Val

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Note added at 2002-10-12 10:26:16 (GMT)
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Dear Jonathan:

Please read the following explanation about \"women-years\". It explains why it is used in plural:

\"For example in older users, the failure rate may be as low as 3 per hundred women years (this means that if 100 women used the method for a year, 3 would become pregnant.) This compares to a failure rate for the pill (when used correctly) of about one in a hundred. But in younger women the failure rate with the diaphragm may be around 10-15 per hundred women years because, for example, these women may not put the diaphragm in properly or every time, or may forget to use the spermicides.\"

http://www.bbc.co.uk/health/ask_doctor/contraception_diaph.s...

Cheerio,

Val