title: Estrogen and osteoarthritis: how do we explain conflicting study results?
mesh_terms: D015982:Bias; D015986:Confounding Factors, Epidemiologic; D015914:Estrogen Replacement Therapy / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010003:Osteoarthritis / Q000139:chemically induced* / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control*; D015203:Reproducibility of Results; D012107:Research Design; D012307:Risk Factors