Epidemiologia Descriptiva - eVirtual UASLP

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Confounding• In a study of whether factor A is a cause of disease B,we say that a third factor, factor X, is a confounder ifthe following are true:• Factor X is a known risk factor for disease B• Factor X is associated with factor A but is not a result offactor AJJH_<strong>UASLP</strong>_201136
Confounding• Factor A: Accutane• Factor B: ↑Suicide• Factor X: DepressionABX• Use of Accutane increase suicide rates?• Individuals taking Accutane are more likely to bedepressed and is depression what cause a highersuicide rateJJH_<strong>UASLP</strong>_201137
Page 1 and 2: Dr. José J. HernándezCentro de In
Page 3 and 4: Epidemiologia• Descriptiva• Ide
Page 5 and 6: Epidemiologia descriptiva• Caract
Page 7 and 8: Epidemiologia descriptiva• Poblac
Page 9 and 10: Caso• Es como definimos lo que bu
Page 11 and 12: Prevalencia• Prevalencia mide la
Page 13 and 14: Cumulative incidence and incidence
Page 15 and 16: Comparación de la incidencia de CH
Page 17 and 18: ¿El uso de Insulina en Pacientes D
Page 19 and 20: Odds Ratio (OR)RESULTADO+ --CHF+ --
Page 21 and 22: JJH_UASLP_201121
Page 23 and 24: Medidas Utilizadas para Describir
Page 25 and 26: JJH_UASLP_201125
Page 27 and 28: Types of error• Types of measurem
Page 29 and 30: Guidelines for judging whether anda
Page 31 and 32: Types of Bias• Selection Bias•
Page 33 and 34: Selection bias• Healthy‐user bi
Page 35: Information bias• Recall bias occ
Page 39 and 40: Random error“Leads to a false ass
Page 41 and 42: ValidityBiasPopulationStudy SampleC
Page 43 and 44: ValidityBiasPopulationStudy SampleC
Page 45 and 46: Conclusions• Internal validity in

Epidemiologia Descriptiva - eVirtual UASLP

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