Question

is notably higher in terms of basic rep rate and case fatality rate; these are in addition to the lack of immunity and effective treatment C. SARS COV-2 (causative virus for COVID 19) is roughly equal in terms of basic repro rate and case fatality rate; the only thing that makes it worse is the lack of immunity ar effective treatment d. SARS COV-2 (causative virus for COVID 19) is generally considered to have lower bas reproductive rate and case fatality rate; the only thing that makes it worse is the lack of immunity and effective treatment 44. (1 pt. ea.) Match the following scenarios with the study design that most closely matches the descriptic Pick the ONE BEST option, but each choice can be used multiple times. Select the letter beside the appropriate study design and place it in the blank beside the question. 43 43. Students who presented to University Health Services for diarrheal a. Cohort disease were compared to students presenting for other reasons. It was found that those with diarrheal disease were 3 times more likely to have eaten in the student dining hall. 44. Graduate students were randomly selected for evaluation of b. Case-control exercise and mental health. Participants completed a survey regarding typical activity level and feelings of anxiety, depression, and stress. 45 45. Records were searched for occurrence of transitional cell carcinoma c. Clinical trial (a rare cancer). Kidney mercury levels from biopsy of those tumors were compared to those of a random sampling of kidney tissue retrieved at time of urolith surgery in otherwise healthy patients. 46. d. Cross- 46. Amateur marathon runners were blocked by sex and age, then sectional assigned to receive an oral nutritional supplement or a placebo. Serum lactate, LDH, and CK levels were measured at two hour intervals up to 24 hours post-performance to assess impact of supplementation on metabolites and recovery.

Answer 1

Note : allowed to solve only 1 question per post.

Match the following
43. Case control

44. Cohort

45.Cross sectional

46. Clinical trial

28. Confusion matrix

No of infected =253 Correctly classified as infected (true positive) = 245 Correctly classified as not infected (true negative) = 844 Total Actual Infected Not infected Infected True Postive False Postive Predicted No infected False negative True Negative Total Total Infected Infected Predicted No infected Total Actual Not infected Total 245 12 8 844 253 856 257 852 1109 Calculation Infected Infected Predicted No infected 253-245=8 Total Actual Not infected Total 245 257-245=12 1109-852=257 844 844+8 = 852 253 844 1109 TP 245 TN 844 EN 8 12 FP Total 1109 Sensitivity = TP /(TP + FN) =245/(245+8)= 0.9684 Specificity= TN / (FP+TN) =844/(12+844)= 0.9860