Which of the following statements is true about Parkinson disease (PD)?

Choice A reason: This is incorrect because 120/80 mm Hg is a normal blood pressure, not a high risk factor for diabetes mellitus. High blood pressure, or hypertension, is a common complication of diabetes mellitus, as it can damage the blood vessels and increase the risk of cardiovascular disease. However, having a normal blood pressure does not rule out the possibility of having diabetes mellitus, as other factors, such as blood sugar level, family history, or lifestyle, can also influence the risk.

Choice B reason: This is incorrect because total cholesterol 198 mg/dL is a borderline high cholesterol level, not a high risk factor for diabetes mellitus. High cholesterol, or hyperlipidemia, is a common complication of diabetes mellitus, as it can affect the metabolism of fats and increase the risk of atherosclerosis and cardiovascular disease. However, having a borderline high cholesterol level does not confirm the diagnosis of diabetes mellitus, as other factors, such as blood sugar level, family history, or lifestyle, can also influence the risk.

Choice C reason: This is incorrect because palpable peripheral pulses are a normal finding, not a high risk factor for diabetes mellitus. Peripheral pulses are the pulsations of the arteries that can be felt in the extremities, such as the wrists or ankles. Palpable peripheral pulses indicate that the blood flow to the extremities is adequate and not compromised by diabetes mellitus. However, having palpable peripheral pulses does not rule out the possibility of having diabetes mellitus, as other factors, such as blood sugar level, family history, or lifestyle, can also influence the risk.

Choice D reason: This is correct because 68 years of age is a high risk factor for diabetes mellitus. Age is one of the non-modifiable risk factors for diabetes mellitus, as the risk increases with advancing age. This is because aging can affect the insulin production and sensitivity, as well as the body composition and function. Older adults are more likely to have diabetes mellitus than younger adults, especially if they have other risk factors, such as obesity, family history, or sedentary lifestyle. Therefore, 68 years of age is a high risk factor for diabetes mellitus.

Choice A reason: A detached retina is a serious condition that occurs when the retina, the light-sensitive layer of tissue at the back of the eye, separates from its underlying support tissue. It can cause vision loss or blindness if not treated promptly. However, it does not usually cause intense headaches or bloodshot eyes, but rather flashes of light, floaters, or a curtain-like shadow over the visual field.

Choice B reason: Macular degeneration is a common eye disorder that affects the macula, the central part of the retina that is responsible for sharp and detailed vision. It can cause blurred or distorted vision, especially in the center of the visual field. However, it does not usually cause intense headaches or bloodshot eyes, but rather difficulty reading, recognizing faces, or seeing colors.

Choice C reason: Cataracts are cloudy areas in the lens of the eye that can impair vision. They are usually related to aging, but can also be caused by other factors such as diabetes, trauma, or radiation. They can cause blurred or dim vision, sensitivity to light, or halos around lights. However, they do not usually cause intense headaches or bloodshot eyes, but rather gradual and painless vision loss.

Choice D reason: Angle-closure glaucoma is a type of glaucoma that occurs when the drainage angle of the eye becomes blocked, causing a sudden increase in the pressure inside the eye. It can damage the optic nerve and lead to permanent vision loss if not treated immediately. It can cause intense headaches, bloodshot eyes, blurred vision, nausea, vomiting, or seeing rainbow-colored rings around lights. It is a medical emergency that requires immediate attention.