Provide three numbers. The number of subjects disease free at the beginning, how
ID: 2921845 • Letter: P
Question
Provide three numbers. The number of subjects disease free at the beginning, how many of these ended up with the disease at the end, and the incidence of diastolic hypertension as well as the diastolic value that appears to be the cutoff between diseased and disease free based on the Diastolic_1_Grp_1 column.
Participant Diastolic_1_Grp_1 Diseased? Diastolic_2_Grp_1 1 92 0 99 0 2 109 1 103 Diseased at Start 3 108 1 99 Diseased at Start 4 101 1 100 Diseased at Start 5 90 0 108 1 6 92 0 104 1 7 101 1 105 Diseased at Start 8 93 0 106 1 9 95 0 105 1 10 106 1 100 Diseased at Start 11 101 1 98 Diseased at Start 12 99 0 102 1 13 104 1 107 Diseased at Start 14 105 1 106 Diseased at Start 15 99 0 101 1 16 94 0 108 1 17 105 1 102 Diseased at Start 18 99 0 104 1 19 108 1 99 Diseased at Start 20 110 1 101 Diseased at Start 21 101 1 99 Diseased at Start 22 100 0 108 1 23 110 1 99 Diseased at Start 13 9Explanation / Answer
There are 23 participants. The column "Diseased?" assigns a number for their initial condition: a 0 for disease free, a 1 for diseased. As the total sum of that column is 13, then there are 10 disease free participants in the beggining.
At the end, the last column marks with 0 the disease free participants, with 1 the newly diseased participants, and labels the participants who started as already diseased. We see the column total as 9, so there is only one disease free participant at the end.
By looking carefully to columns 2 and 3, we find that participant 22 has a score of 100 points on Diastolic-1 and is marked as diseased free, while participants 4, 7, 11 and 21 all have 101 points are marked as diseased. We may assume that the criteria is to classify a subject as diseased if their diastolic pressure is equal or greater than 101.
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