The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A researcher is studying risk factors for open-angle glaucoma in a group of elderly patients at a primary care clinic. He is curious if patients with diabetes (defined as fasting serum glucose ≥126 mg/dL on two separate readings) are at increased risk of developing open-angle glaucoma over time. Which of the following is the best statement of the null hypothesis for this study?   (A) The future risk of open-angle glaucoma is the same in patients with and those without diabetes   (B) Having diabetes will not cause changes in risk of future open-angle glaucoma   (C) Diabetes is not associated with an increased prevalence of open-angle glaucoma   (D) Improved adherence to antidiabetics will not be effective in decreasing future open-angle glaucoma risk
['(A) The future risk of open-angle glaucoma is the same in patients with and those without diabetes <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) The future risk of open-angle glaucoma is the same in patients with and those without diabetes \n (B) Having diabetes will not cause changes in risk of future open-angle glaucoma \n (C) Diabetes is not associated with an increased prevalence of open-angle glaucoma \n (D) Improved adherence to antidiabetics will not be effective in decreasing future open-angle glaucoma risk <> possible answers', '  A researcher is studying risk factors for open-angle glaucoma in a group of elderly patients at a primary care clinic. He is curious if patients with diabetes (defined as fasting serum glucose ≥126 mg/dL on two separate readings) are at increased risk of developing open-angle glaucoma over time. Which of the following is the best statement of the null hypothesis for this study? <> context@']