9. Look at the footnotes in table 1 and choose the correct statement:
a. Missing data on pack-years of smoking may introduce bias given that non-cases are more likely to have missing smoking data compared with cases.
b. It is unlikely that missing pack-years of smoking will bias the results given that cases and non-cases have similar proportions of missing pack-years data.
c. The rate of missingness of pack-year data in non-cases is unacceptably high therefore this variable should not be used in the analysis.
d. Both A and C are correct
Correct option:
b. It is unlikely that missing pack-years of smoking will bias the results given that cases and non-cases have similar proportions of missing pack-years data.
The given statistics is mean and standard deviation, the standard deviation in both the case if very high and almost equal to the mean. Hence the variation in the data is very high. But since the proportions of the missing data is the same, the over all statistics will remain the same.
9. Look at the footnotes in table 1 and choose the correct statement: a. Missing data...
7. What is the purpose of Table 1 ?
a. To display the main analytical findings of the study.
b. To display the most pertinent sub-analyses findings.
c. To display descriptive participant characteristics by
exposure or outcome group (depending on study design).
d. Both A and B are correct.
Table 1. Characteristics of Case and Noncase Patients With Rheumatoid Arthritis, Sister Study, United States, 20042009 Case Patients Noncase Patients With RA Characteristic (n 424)(n 48,919) No. % 57.9 (8.2) 55.1...
11. Study Table 2 that reports the odds-ratios comparing various
measures of pesticide exposures in childhood to RA status. In one
(1) sentence explain the difference between the age-adjusted and
fully-adjusted model.
Table2. Childhood Residential Factors, Potential Pesticide Exposures, and Association With Rheumatoid Arthritis Sister Study, United States, 2004-2009 Case Patients Patients (n 48,919) Fully Adjusted Age Adjusted Longest Residence to Age 14Years RA (n 424) %OR 95% CI OR 95% Cl Residential area Urban Suburban/other Small town Rural 25...
12. The only finding in Table 2 that is statistically
significant (p<0.05) using the fully-adjusted model is:
a. Personally applying residential pesticides most or all of the
time
b. Ever exposed to residential pesticides on a monthly basis
c. Not living on a farm or near a farm
D. Both A and B are correct
d.
Table2. Childhood Residential Factors, Potential Pesticide Exposures, and Association With Rheumatoid Arthritis Sister Study, United States, 2004-2009 Case Patients Patients (n 48,919) Fully Adjusted...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...