Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

My NCBI Filters
Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1793 1
1811 1
1813 1
1814 1
1818 1
1819 2
1820 4
1824 1
1826 2
1829 3
1830 1
1831 2
1836 1
1837 1
1838 1
1840 1
1841 1
1842 5
1843 6
1845 8
1847 1
1848 2
1849 3
1850 2
1851 2
1852 2
1853 2
1855 5
1856 4
1858 2
1859 4
1860 1
1861 4
1862 1
1863 3
1864 1
1866 1
1867 3
1868 7
1869 2
1870 2
1871 1
1872 2
1873 4
1874 5
1875 2
1876 3
1877 5
1878 3
1879 2
1880 3
1881 2
1882 2
1883 12
1884 11
1885 14
1886 22
1887 7
1888 3
1889 7
1890 8
1891 5
1892 13
1893 40
1894 13
1895 8
1896 18
1897 19
1898 13
1899 15
1900 23
1901 16
1902 32
1903 26
1904 28
1905 41
1906 42
1907 58
1908 39
1909 60
1910 50
1911 90
1912 125
1913 142
1914 113
1915 114
1916 127
1917 119
1918 115
1919 147
1920 158
1921 157
1922 215
1923 198
1924 191
1925 246
1926 235
1927 236
1928 246
1929 244
1930 236
1931 228
1932 245
1933 248
1934 235
1935 241
1936 270
1937 234
1938 276
1939 259
1940 255
1941 224
1942 234
1943 237
1944 242
1945 536
1946 1187
1947 1500
1948 1587
1949 1391
1950 1887
1951 2548
1952 2920
1953 3325
1954 3107
1955 3929
1956 6416
1957 7731
1958 7882
1959 7533
1960 7861
1961 9185
1962 7450
1963 24696
1964 47356
1965 35285
1966 18334
1967 12934
1968 11198
1969 10240
1970 11036
1971 10491
1972 10830
1973 11564
1974 14960
1975 52941
1976 63904
1977 67952
1978 70551
1979 74363
1980 92414
1981 113888
1982 121066
1983 130063
1984 135586
1985 140132
1986 147036
1987 156066
1988 165654
1989 176068
1990 183259
1991 188511
1992 195998
1993 203042
1994 215114
1995 224244
1996 230000
1997 238022
1998 249763
1999 260079
2000 277525
2001 289828
2002 302786
2003 327277
2004 355597
2005 399064
2006 435164
2007 466271
2008 500459
2009 528749
2010 573143
2011 624179
2012 668147
2013 709752
2014 746910
2015 767033
2016 690395
2017 649084
2018 724155
2019 763917
2020 792360
2021 142309
Text availability
Article attribute
Article type
Publication date

Search Results

14,601,083 results
Results by year
Filters applied: . Clear all
Page 1
Design and analysis of pilot studies: recommendations for good practice.
Lancaster GA, Dodd S, Williamson PR. Lancaster GA, et al. J Eval Clin Pract. 2004 May;10(2):307-12. doi: 10.1111/j..2002.384.doc.x. J Eval Clin Pract. 2004. PMID: 15189396
Pilot studies play an important role in health research, but they can be misused, mistreated and misrepresented. In this paper we focus on pilot studies that are used specifically to plan a randomized controlled trial (RCT).
Pilot studies play an important role in health research, but they can be misused, mistreated and misrepresented. In thi
The feasibility of creating a checklist for the assessment of the methodological quality both of randomised and non-randomised studies of health care interventions.
Downs SH, Black N. Downs SH, et al. J Epidemiol Community Health. 1998 Jun;52(6):377-84. doi: 10.1136/jech.52.6.377. J Epidemiol Community Health. 1998. PMID: 9764259 Free PMC article.
DESIGN: A pilot version was first developed, based on epidemiological principles, reviews, and existing checklists for randomised studies. ...CONCLUSIONS: This study has shown that it is feasible to develop a checklist that can be used to assess
DESIGN: A pilot version was first developed, based on epidemiological principles, reviews, and existing checklists for rand
Cohort studies: marching towards outcomes.
Grimes DA, Schulz KF. Grimes DA, et al. Lancet. 2002 Jan 26;359(9303):341-5. doi: 10.1016/S0140-6736(02)07500-1. Lancet. 2002. PMID: 11830217
Reduction of loss to follow-up over time is a challenge, since differential losses to follow-up introduce bias. Variations on the cohort theme include the before-after study and nested case-control study (within a cohort study). ...This f …
Reduction of loss to follow-up over time is a challenge, since differential losses to follow-up introduce bias. Variations on the coh …
A tutorial on pilot studies: the what, why and how.
Thabane L, Ma J, Chu R, Cheng J, Ismaila A, Rios LP, Robson R, Thabane M, Giangregorio L, Goldsmith CH. Thabane L, et al. BMC Med Res Methodol. 2010 Jan 6;10:1. doi: 10.1186/1471-2288-10-1. BMC Med Res Methodol. 2010. PMID: 20053272 Free PMC article.
Pilot studies for phase III trials - which are comparative randomized trials designed to provide preliminary evidence on the clinical efficacy of a drug or intervention - are routinely performed in many clinical areas. ...The objec
Pilot studies for phase III trials - which are comparative randomized trials designed to provide prelimin
Very-low-calorie ketogenic diet with aminoacid supplement versus very low restricted-calorie diet for preserving muscle mass during weight loss: a pilot double-blind study.
Merra G, Miranda R, Barrucco S, Gualtieri P, Mazza M, Moriconi E, Marchetti M, Chang TF, De Lorenzo A, Di Renzo L. Merra G, et al. Eur Rev Med Pharmacol Sci. 2016 Jul;20(12):2613-21. Eur Rev Med Pharmacol Sci. 2016. PMID: 27383313 Free article. Clinical Trial.
PATIENTS AND METHODS: The clinical study was conducted with a randomized case-control in which twenty-five healthy subjects gave informed consent to participate in the interventional study and were evaluated for their health and nutrition …
PATIENTS AND METHODS: The clinical study was conducted with a randomized case-control in which twenty-fiv …
How to design a good case series.
Kooistra B, Dijkman B, Einhorn TA, Bhandari M. Kooistra B, et al. J Bone Joint Surg Am. 2009 May;91 Suppl 3:21-6. doi: 10.2106/JBJS.H.01573. J Bone Joint Surg Am. 2009. PMID: 19411496
As there is no experimental protocol or control for allocation of patients to treatment, surgeons and patients decide on whether or not treatment is given, making the clinical sample representative of a common clinical population. Results
As there is no experimental protocol or control for allocation of patients to treatment, surgeons and patients decide o …
How to design a randomised controlled trial.
Brocklehurst P, Hoare Z. Brocklehurst P, et al. Br Dent J. 2017 May 12;222(9):721-726. doi: 10.1038/sj.bdj.2017.411. Br Dent J. 2017. PMID: 28496211
This practical paper explains how to design an randomised controlled trial (RCT) for those who have little prior knowledge of the topic. It covers the basics of radomisation, statistical testing, sample size caluclations, bias and the role of …
This practical paper explains how to design an randomised controlled trial (RCT) for those who have little prior …
Propensity Score Matching: Retrospective Randomization?
Jupiter DC. Jupiter DC. J Foot Ankle Surg. 2017 Mar-Apr;56(2):417-420. doi: 10.1053/j.jfas.2017.01.013. J Foot Ankle Surg. 2017. PMID: 28231973
Randomized controlled trials are viewed as the optimal study design. ...In such situations, specifically, in retrospective studies, we should make every effort to recapitulate the rigor and strength of the randomized trial.
Randomized controlled trials are viewed as the optimal study design. ...In such situations, specifically,
Prospective randomized controlled pilot study on the effects of almond consumption on skin lipids and wrinkles.
Foolad N, Vaughn AR, Rybak I, Burney WA, Chodur GM, Newman JW, Steinberg FM, Sivamani RK. Foolad N, et al. Phytother Res. 2019 Dec;33(12):3212-3217. doi: 10.1002/ptr.6495. Epub 2019 Oct 1. Phytother Res. 2019. PMID: 31576607 Free PMC article. Clinical Trial.
METHODS: This was a prospective, investigator-blinded, randomized controlled trial in which subjects consumed 20% of their daily energy consumption in either almonds or a calorie-matched snack for 16 weeks. This study was completed at the …
METHODS: This was a prospective, investigator-blinded, randomized controlled trial in which subjects cons …
Eliminating bias in randomized controlled trials: importance of allocation concealment and masking.
Viera AJ, Bangdiwala SI. Viera AJ, et al. Fam Med. 2007 Feb;39(2):132-7. Fam Med. 2007. PMID: 17273956 Free article.
Randomization in randomized controlled trials involves more than generation of a random sequence by which to assign subjects. ...Both allocation concealment and masking add to the elimination of bias in randomized control
Randomization in randomized controlled trials involves more than generation of a random sequence by which
14,601,083 results
You have reached the last page of results. A maximum of 10,000 results are available.
Jump to page