They found a total of 59 patients. Fill in the attack rate per million[SL1] and the RR
Question:
They found a total of 59 patients. Fill in the attack rate per million[SL1] and the RR by characteristic – use the category of that characteristic marked with a * as the reference group (may differ from original paper)
Characteristic #cases(%) NYC population attack rate** RR by per million pop. characteristic
Age(yr)
0–19 * 2 (3) 2,324,081 0.9 1.0
20–29 1 (2) 1,553,981 0.6 ____
30–39 3 (5) 1,549,111 1.9 ____
40–49 1 (2) 1,177,190 1.7 ____
50–59 9 (15) 867,331 10.4 ____
60–69 13 (22) 814,838 16.0 ____
70–79 18 (31) 534,785 33.7 ____
»80 12 (20) 281,054 42.7 49.615
Age category (yr)
»50 * 52 (88) 2,498,008 20.8 ____
<50 7 (12) 6,604,363 1.06 1.0
Sex
Male* 31 (53) 4,289,988 7.2 ____
Female 28 (47) 4,812,383 5.8 1.0
Race
White* 41 (69) 5,983,901 6.9 ____
Nonwhite 9 (15) 3,118,470 2.9 1.0
Unknown 9 (15) ------ n/a n/a
Borough or county of residence
New York City
Brooklyn (Kings) * 3 (5) 2,300,664 1.3 ___
Bronx 9 (15) 1,203,789 7.5 ____
Manhattan 1 (2) 1,487,536 0.7 ____
Queens 32 (54)§ 1,951,599 16.4 ____
Staten Island 0 379,999 0 ____
New York State
(just outside the city) 14 2,162,214 we will ignore this risk group for this exercise
*Population figures are from the 1990 U.S. Census. †CI denotes confidence interval. . §This group includes a Canadian tourist who became ill after visiting relatives in Queens
Actually, the authors called it “rate of infection” in this column but still attack rates in the heading. That is somewhat misleading since the data has no unit of time (not a rate) and this only counts cases- not actual infections. These are accepted limitations of what is generally called “attack rate” in an investigation
Calculate the overall attack rate [SL2] (1 pt.)
Describe 2 of the patterns you can see from this data. (2pts)
Statistics for the Behavioral Sciences
ISBN: 978-1111830991
9th edition
Authors: Frederick J Gravetter, Larry B. Wallnau