You would like to assess the effectiveness and efficiency of delivering health services through your clinic. After selecting a 20% sample of all patient visits during the past six months, you are able to characterize the patient population who used your clinic in terms of age, race, sex, method of ...
You would like to assess the effectiveness and efficiency of delivering health services through
your clinic. After selecting a 20% sample of all patient visits during the past six months, you are
able to characterize the patient population who used your clinic in terms of age, race, sex,
method of referral, diagnostic category, therapy provided, and method of payment. - ANS
Cross-sectional
You are interested in finding out whether middle-aged men who have irregular heartbeats are at
greater risk of developing a heart attack than men whose heartbeats are regular.
Electrocardiogram (ECG) examinations are performed on all male office employees 35 years of
age or older who work forTexas Health Resources (THR) in Tarrant County and use THR health
services. The ECG exam results are classified as irregular or regular. Eight years later,
myocardial infarction rates are compared between those with and those without baseline ECG
irregularities. - ANS Prospective Cohort
To test the efficacy of a liquid vitamin D supplement in preventing cancer, study participants are
randomly assigned to one of two groups: one in which 1000 mg of liquid vitamin Dis
administered daily, and one in which a liquid placebo is administered daily.Both groups are
followed for 15 years to determine the occurrence of cancer. - ANS Clinical
trial/randomized control trial
The physical examination records of the incoming freshmen class of 1960 at the University of
Texas at Arlington are examined in 2000to see whether their recorded height and weight at the
time of admission to the university are related to their chance of developing coronary heart
disease by 2000. - ANS Retrospective cohort
The entire population of women over age 60 in a given community is examined, and all who are
determined to be free from having osteoporosis are questioned extensively about their diets.
These women then are followed for several years to see whether or not their eating habits will
predict their risk of developingosteoporosis. - ANS Prospective cohort
Men and women are identified who developed a rare form of lung cancer in their 30s. The type
of cancer is hypothesized to be associated with asbestos. The participants are asked about the
different places they have lived, worked and gone to school over the past 25 years. State
environmental records showing asbestos removal and asbestos control are then
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