Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 6:49 PM
Ignite Modification Date:
2025-12-24 @ 6:49 PM
NCT ID:
NCT00335257
Brief Summary:
The study compares the short- and long-term risks of a 24-day regimen of a drospirenone-containing oral contraceptive with the risks of established oral contraceptives in a study population that is representative for the actual users of the individual preparations.
Detailed Description:
Drospirenone is a novel progestogen with antiandrogenic and antimineralocorticoid properties. A large active post-marketing surveillance study has demonstrated that a 21-day regimen of 3mg drospirenone and 30mcg ethinylestradiol can be used safely for oral contraception. This study investigates the risks of short and long-term use of a 24-day regimen of drospirenone/ethinylestradiol in comparison to established OCs in a study population that is representative of the actual users of the individual preparations.
INAS-OC is a prospective, controlled, non-interventional cohort study with two study arms: OCs containing drospirenone and OCs containing any other progestogen. The study was started in the USA in April 2005 and was extended to several European countries in September 2008 based on the launch status of the 24-day regimen. New users of an OC (starters, switchers without a pill intake break and recurrent users with a pill intake break \[same or different OC\]) are accrued by a network of prescribing physicians. Baseline and follow-up information are collected via a self-administered questionnaire. Data analysis will be based on life-table methods comparing the cohorts. All analyses will make allowance for confounding, using methods that will include multivariate techniques such as Cox regression.
Study:
NCT00335257
Study Brief:
Protocol Section:
NCT00335257