1) Correct answer is D (There is conflicting evidence with regards to the prognostic benefits of bariatric surgery).
Option ‘D’ is correct and supported by the opposing findings in paragraph two. Whilst the passage mentions four types of bariatric surgery, it does not state that these are the only options available; meaning that option ‘A’ cannot be definitively concluded. Option B is incorrect as despite some long term studies agreeing with this, paragraph two states that a study in VA found opposing results, hence this mortality benefit is not present in ‘all groups’. The beginning of the third paragraph states that bariatric surgery is currently recommended for obese patients with a BMI of at least 40, making statement C incorrect. Option ‘E’ is unfounded and cannot be concluded based on the information provided.
2) Correct answer is A (Efficient digestion is often impaired)
This question mainly relates to the final paragraph which states that absorption (a component of overall digestion) is reduced, hence supporting statement ‘A’. Option ‘B’ is incorrect as the last paragraph does not support this and instead implies that patients do not have the appetite to overeat due to the side effects. These side effects include nausea and vomiting which rather than being common after surgery, are problematic on over-eating making option ‘C’ incorrect. In relation to option ‘D’, the passage states that alcohol should be avoided after surgery; however the exact reason is not given or implied. Statement ‘E’ is not stated and would be surprising given the mentioned indications for bariatric surgery.
3) Correct answer is C (Appetite is reduced after bariatric surgery)
This statement is supported by the final sentence which states ‘Because patients cannot eat a large quantity of food (ie. Appetite is reduced), physicians typically recommend…..’ We are told in the first paragraph that gastric banding involves reducing the size of the stomach, and cannot conclude if this is through removal of a portion of the stomach, making option ‘A’ unfounded. Whilst option ‘B’ may be correct, this is not mentioned anywhere in the passage. Option ‘D’ is clearly contradicted by the guidelines in the passage and option ‘E’ is not referred to.
4) Correct answer is C (Not all patients require dietary supplements following bariatric surgery).
In the last paragraph it states that ‘Many patients will need to take a daily multivitamin pill..’ hence suggesting that not all patients require dietary supplementation. Options ‘A’, ‘B’, ‘D’ and ‘E’ are not discussed in any way making them unlikely inferences.