Abstract:
:In 1989, the authors tested the effectiveness of two response-enhancing techniques, a postage stamped or franked return envelope and a prenotification letter, in a survey of pregnancy among 10,047 resident physicians in the United States. The techniques were randomly assigned using a factorial design. No significant interactions were observed between the techniques. After two mailings, those who received a stamped return envelope had a response of 71.2%, compared with 68.2% for those who received a franked return envelope (95% confidence interval 1.3-4.9%). Men who received the stamped envelope had a 5.9% greater response than those who received the franked envelope (p less than 0.001), but the type of postage did not influence response among women (p = 0.84); this interaction was statistically significant (p = 0.006). Physicians who received a prenotification letter had a response of 69.0%, compared with 70.5% for those who did not receive the letter (95% confidence interval -3.3 to 0.2%). The authors conclude that seemingly minor changes in survey design could have saved from 12% to 19% of the total cost of the study.
journal_name
Am J Epidemioljournal_title
American journal of epidemiologyauthors
Shiono PH,Klebanoff MAdoi
10.1093/oxfordjournals.aje.a116126subject
Has Abstractpub_date
1991-09-01 00:00:00pages
539-42issue
5eissn
0002-9262issn
1476-6256journal_volume
134pub_type
临床试验,杂志文章,随机对照试验abstract::This study determined the distributions of uncorrected visual acuity and of refractive error in representative groups of Australian Aborigines and Australians of European origin aged 20-30 years. The methodology used in this study and its verification are described in detail. As a group, the Aborigines have significan...
journal_title:American journal of epidemiology
pub_type: 杂志文章
doi:10.1093/oxfordjournals.aje.a113067
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abstract::The hypothesis that a low educational level increases the risk for Alzheimer's disease remains controversial. The authors studied the association of years of schooling with the risk for incident dementia and Alzheimer's disease by using pooled data from four European population-based follow-up studies. Dementia cases ...
journal_title:American journal of epidemiology
pub_type: 杂志文章
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更新日期:2000-06-01 00:00:00
abstract::Evidence for a relation between physical activity and renal cell cancer has been inconsistent. The authors examined physical activity in relation to renal cell cancer in a large, prospective US cohort study of 482,386 participants (289,503 men and 192,883 women) aged 50-71 years at baseline (1995-1996). At baseline, p...
journal_title:American journal of epidemiology
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abstract::There is accumulating evidence suggesting that children may drive the spread of influenza epidemics. The objective of this study was to quantify the lead time by age using laboratory-confirmed cases of influenza A for the 1995/1996-2005/2006 seasons from Canadian communities and laboratory-confirmed hospital admission...
journal_title:American journal of epidemiology
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abstract::The loss of CD4 lymphocytes is known to be an important component of human immunodeficiency virus type 1 (HIV-1) pathogenesis. It remains unclear, however, whether the importance of the CD4 lymphocyte count is such that individuals who have been infected for widely different lengths of time, but for whom the CD4 lymph...
journal_title:American journal of epidemiology
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journal_title:American journal of epidemiology
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更新日期:1993-03-15 00:00:00
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更新日期:2013-10-01 00:00:00
abstract::A matched case-control study was conducted of 53 leukemia deaths and of 212 controls within a previously studied cohort of 24,545 on-shore workers employed between January 1, 1952 and August 15, 1977 at the Portsmouth (New Hampshire) Naval Shipyard. The study sought to ascertain a priori whether there was an associati...
journal_title:American journal of epidemiology
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abstract::A five-year intervention study of the effectiveness of the "Know Your Body" program in reducing coronary heart disease risk factors among black students in the District of Columbia, who were in grades 4-6 at baseline, was begun in 1983. Nine schools were stratified on socioeconomic status and randomly assigned to cont...
journal_title:American journal of epidemiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/oxfordjournals.aje.a115158
更新日期:1989-03-01 00:00:00
abstract::An industry-wide mortality study on the association between lung cancer and occupational exposure to cobalt and tungsten carbide was carried out in the French hard-metal industry. This case-control study was nested in the historical cohort of workers ever employed in this industry's 10 facilities, most of which are lo...
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更新日期:2012-03-15 00:00:00
abstract::The associations between alcohol consumption and cigarette smoking habits and the risk for colorectal adenomatous polyps according to the detailed clinical information about polyps were assessed in a large colonoscopy-based study. The study enrolled participants who visited the National Cancer Center of the Republic o...
journal_title:American journal of epidemiology
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journal_title:American journal of epidemiology
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journal_title:American journal of epidemiology
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更新日期:2007-08-01 00:00:00
abstract::To assess whether recent coffee consumption is related to the incidence of large bowel cancer, the authors analyzed data from a multipurpose hospital-based case-control study of several cancers, conducted from 1978 to 1986 in Boston, Massachusetts, New York, New York, Philadelphia, Pennsylvania, and Baltimore, Marylan...
journal_title:American journal of epidemiology
pub_type: 杂志文章
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更新日期:1989-11-01 00:00:00
abstract::The authors report the results of a case-cohort study of 338 lung cancer deaths in 1950-1988 and a random sample (sub-cohort) of 1,138 from among 16,297 men who had worked at least one year between 1950 and 1979 in manual jobs at a large aluminum production plant. In the past, certain workers were exposed to substanti...
journal_title:American journal of epidemiology
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更新日期:1994-02-01 00:00:00
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更新日期:1980-05-01 00:00:00
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abstract::Coronary artery calcification (CAC) and common carotid artery intima-media thickness (CIMT) are measures of subclinical vascular disease. This 2000-2006 study aimed to characterize the associations among coronary artery disease risk factors, CAC quantity, and CIMT and to estimate shared genetic and environmental contr...
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abstract::Mammographic percent density, the proportion of fibroglandular tissue in the breast, is a strong risk factor for breast cancer, but its determinants in young women are unknown. We examined associations of magnetic resonance imaging (MRI) breast-tissue composition at age 21 years with prospectively collected measuremen...
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abstract::The relation of reproductive factors to risk of myocardial infarction in women aged 45-69 years was examined in a case-control interview study carried out in Massachusetts from 1986 to 1990. Each of 858 cases of first myocardial infarction was age-matched with a control from the same precinct of residence. Conditional...
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