Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

224 results
  1. ... 90 percent of women were postmenopausal at the time of enrollment in the cohort. Information on breastfeeding was collected in 1994 to 1997; total duration of breastfeeding was calculated as the sum of ...
  2. ... Wednesday, 100 mg; Friday, 150 mg), urine samples collected 3 times/week, and weekly group therapy sessions Study quality: 1++ Study Type: RCT ( randomised controlled trial ) Blindness: No mention Duration (days): Mean 84 Followup: 6 months Setting: US ...
  3. ... data to support a CEA, especially past this time frame, are likely to be very limited. Resource Use, Size, and Duration Because a CEA can draw from previously collected data, the cost of such a study should ...
  4. ... patient record and the potential inconsistencies in data collected over time and between providers. ... duration of preventive pharmacologic treatments for chronic migraine? (T) ...
  5. ... size of an observational study. Time Period and Duration of ... the time the data were collected. If the question is about a newly available ...
  6. ... of risk or risk difference can be calculated. Duration: The planning of a registry must reflect the length of time that the registry is expected to collect the data in order to achieve its purpose and provide analysis of the data collected. Some registries are limited by commercial interests, such ...
  7. ... reducing the benefit of administering breast milk. Temperature-time parameters of the heat ... Milk samples were collected during the fourth week of lactation from women ...
  8. ... of treatments is calculated based on valuing faster time to resolution using a ... choice decisions on duration of symptoms only, the baseline population value of ...
  9. ... Yes Yes Bansal, 2015 56 None FRAX input collected at time of DXA or from review of medical records. ... D’Amelio, 2005 88 NR Clinical risk factors collected at the time of DXA scan Yes Yes Yes Yes D’ ...
  10. ... ratio, depending on the nature of the data collected, the duration of the study, and the frequency of the ... effect modifying variables. For medication exposures, are dose, duration, and calendar time under consideration? Directed acyclic graphs (DAGs) can be ...
first · previous · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · next · last