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- Newsgroups: talk.abortion
- Path: sparky!uunet!decwrl!csus.edu!netcom.com!ray
- From: ray@netcom.com (Ray Fischer)
- Subject: Re: CONTRACEPTIVE FAILURE RATES, NFP SUCCESS RATES
- Message-ID: <xbnng8=.ray@netcom.com>
- Date: Sat, 05 Sep 92 07:03:58 GMT
- Organization: Netcom - Online Communication Services
- References: <1992Aug31.201514.17406@watson.ibm.com> <1992Sep4.200249.13122@noao.edu>
- Lines: 20
-
- forgach@noao.edu (Suzanne Forgach) writes ...
- > As you may recall, the method effectiveness of the model was 99.6 percent
- >in the Creighton-St. John's Mercy study conducted in 1980 (559 couples;
- >4,957 couple months of use) (see Table 1). In 1985, Joanne Doud published
- >the results of her study at St. Francis Hospital of Wichita, Kansas. The
- >method effectiveness was 99.1 percent (376 couples; 2,463 months of use).
- >In the most recent study, the largest to date, the method effectiveness is
- >99.9 percent (697 couples; 7,238 couple months of use).
-
- Very interesting numbers indeed! Few questions though. I'm not sure
- what they mean by "effectiveness" or how they are measuring it. With
- "conventional" contraceptives effectiveness generally refers to how often
- the woman can expect to not get pregnant each time she has intercourse.
- (that is, if my memory is correct). The information you posted doesn't
- include any information about just what the numbers _mean_. I'd appreciate
- more data, as it could be useful.
-
- --
- Ray Fischer
- ray@netcom.com
-