From the parmacoepi point of view, the best risk estimator is the relative risk (RR, event rate in exposed/event rate in non-exposed). This cannot be measured in case-controls studies, because the cases and the controls are independent, and the overall event rates are fixed by the cas/control ratio.
Bay of Campeche. Bay of Campeche, also called Gulf of Campeche, Spanish BahÃ­a de Campeche, bay of the Gulf of Mexico, southern Mexico. It is bounded by the YucatÃ¡n Peninsula to the east, by the Isthmus of Tehuantepec to the south, and by southern Veracruz to the west.
The state of Campeche in southeastern Mexico occupies the western part of the Yucatan Peninsula. Named for the ancient Mayan province of Kimpech, Campeche includes the ruins of numerous Mayan cities. It borders the states of Yucatan to the north and east, Quintana Roo to the east, and Tabasco to the southwest.