Fundamentals of Biostatistics
8th Edition
ISBN: 9781305268920
Author: Bernard Rosner
Publisher: Cengage Learning
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Chapter 13, Problem 21P
A logistic
13.21 Estimate the odds ratio for being a case comparinga subject with a lifetime acetaminophen intake of 1100g vs. a lifetime acetaminophen intake of 100g. Provide a 95% CI for this odds ratio.
Table 13.46 Logistic Regression relating decrease in GFR of ≥ 30% over 11 years vs. lifetime acetaminophen intake/100 (continuous variable)
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Do the data provide sufficient evidence to suggest that weight perception and smoking status are related in adolescents?
Use α=.10.
Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without asthma or other respiratory conditions that often have restricted PEF. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Run the appropriate test at a = 0.05.
Group
Number of Children
Mean PEF
Std Dev PEF
Chronic Bronchitis
25
274
59
No Chronic Bronchitis
25
317
73
Research indicates that there may be a relationship between caffeinated coffee consumption and risk of depression in women. Provided is data on the amount of caffeinated coffee consumed and whether the woman was diagnosed with clinical depression. Of interest is to see if there is evidence of an association between caffeinated coffee intake and clinical depression in women. Using the provided output, what is the pvalue and what are the results of the test?
Caffeinated coffee
Depression
<1 cup/wk
>=1 cup/day
2-3 cups/day
4+ cups/day
Total
Yes
670
1278
564
95
2607
No
11545
22573
11726
2288
48132
Total
12215
23851
12290
2383
50739
Pearson's Chi-squared testdata: coffeeX-squared = 19.472, df = 3, p-value = 0.0002184
A. pvalue=3 <= alpha(0.05), H0 is rejected. There is an association between depression and caffeine intake in women
B. pvalue=19.472 <= alpha(0.05), H0 is rejected. There is an association between depression and caffeine intake in…
Chapter 13 Solutions
Fundamentals of Biostatistics
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- determine if the frequency of deficiencies of variable (influenza/pneumococcal shots) are statistically significantly different between for-profit and non-profit nursing homes, interpret the results for the chi-square?arrow_forwardPeak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without asthma or other respiratory conditions often have restricted PEF. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Run the appropriate test at = 0.05. Group Number of Children Mean PEF Std PEF Chronic Bronchitis 25 281 68 No Bronchitis 25 319 74arrow_forward
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