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Results for “Population Statistics”

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At least 649 records · Page 36Linked to original sources
PubMed1995

Acute leg ischaemia--a case for the junior surgeon?

OBJECTIVE: To evaluate the change in the type of acute leg ischaemia and the outcome of its treatment in relation to the experience of the surgeon responsible for the treatment. DESIGN: A 12-year (1980-1991) retrospective study based on hospital records and population vital statistics. SETTING: A defined population of 165,000 served by one central hospital (CH) and two district hospitals (DH). SUBJECTS: 282 interventions performed for acute leg ischaemia. MAIN OUTCOME MEASURES: Type of leg ischaemia, reintervention, amputation and survival rates in relation to the type of ischaemia, treatment and surgical expertise. RESULTS: Thrombotic acute ischaemia increased by 91% and graft occlusions by 130% while embolisation numbers remained unchanged during the period. With junior, general and vascular surgeons operating on acute ischaemia, the respective 30-day amputation rates were 25%, 18% and 9%. Postoperative mortality was 29%, 33% and 8% respectively. The reconstruction rate for the vascular surgeon was 67% with 33% thrombectomies, while the figures for junior surgeons were 2% and 98% and for senior surgeons 6% and 94%. CONCLUSION: Mortality and amputation rates in acute ischaemia are high. By judicious use of different treatment modalities, as judged by vascular surgical experience, better limb salvage rates may be achieved especially in patients with acute on chronic ischaemia.

Acute Disease↗
PubMed2002

Statistical properties of new neutrality tests against population growth.

A number of statistical tests for detecting population growth are described. We compared the statistical power of these tests with that of others available in the literature. The tests evaluated fall into three categories: those tests based on the distribution of the mutation frequencies, on the haplotype distribution, and on the mismatch distribution. We found that, for an extensive variety of cases, the most powerful tests for detecting population growth are Fu's F(S) test and the newly developed R(2) test. The behavior of the R(2) test is superior for small sample sizes, whereas F(S) is better for large sample sizes. We also show that some popular statistics based on the mismatch distribution are very conservative.

Computer Simulation↗
PubMed2004

Summary health statistics for the U.S. population: National Health Interview Survey, 2002.

OBJECTIVES: This report presents both age-adjusted and unadjusted health statistics from the 2002 National Health Interview Survey (NHIS) for the civilian noninstitutionalized population of the United States, classified by age, sex, race and Hispanic or Latino origin, family income, poverty status, education, place of residence, region of residence, and, where appropriate, health insurance coverage. The topics covered are health status and limitations in activities, special education or early intervention services, injuries and poisonings, health care access and utilization, and health insurance coverage. SOURCE OF DATA: The NHIS is a household, multistage probability sample survey conducted annually by interviewers of the U.S. Census Bureau for the Centers for Disease Control and Prevention's National Center for Health Statistics. In 2002, household interviews were completed for 93,386 persons living in 36,161 households, reflecting a household response rate of 89.6%. SELECTED HIGHLIGHTS: Nearly 7 in 10 persons were in excellent or very good health in 2002. About 34 million persons (12%) were limited in their usual activities due to one or more chronic health conditions, and about 4 million persons (2%) required the help of another person with activities of daily living. About 6% of children received special education or early intervention services. Among persons under age 65 years, about 40 million (17%) did not have any health insurance coverage. The most common reason for lacking health insurance was cost, followed by a change in employment.

Activities of Daily Living↗