Walter SD - Search Results

1

An opportunity cost approach to sample size calculation in cost-effectiveness analysis.

Gafni A, Walter SD, Birch S, Sendi P. Gafni A, et al. Among authors: walter sd. Health Econ. 2008 Jan;17(1):99-107. doi: 10.1002/hec.1244. Health Econ. 2008. PMID: 17497751

2

The analysis of regional patterns in health data. I. Distributional considerations.

Walter SD. Walter SD. Am J Epidemiol. 1992 Sep 15;136(6):730-41. doi: 10.1093/oxfordjournals.aje.a116552. Am J Epidemiol. 1992. PMID: 1442739

It is recommended that these regional differences be routinely taken into account, which can be done with relatively little additional computation. A companion paper (Walter SD. The analysis of regional patterns in health data. II. The power to detect environmental …

It is recommended that these regional differences be routinely taken into account, which can be done with relatively little additional compu …

3

The analysis of regional patterns in health data. II. The power to detect environmental effects.

Walter SD. Walter SD. Am J Epidemiol. 1992 Sep 15;136(6):742-59. doi: 10.1093/oxfordjournals.aje.a116553. Am J Epidemiol. 1992. PMID: 1442740

4

Empirical evidence of bias in infertility research: overestimation of treatment effect in crossover trials using pregnancy as the outcome measure.

Khan KS, Daya S, Collins JA, Walter SD. Khan KS, et al. Among authors: walter sd. Fertil Steril. 1996 May;65(5):939-45. doi: 10.1016/s0015-0282(16)58265-x. Fertil Steril. 1996. PMID: 8612853 Clinical Trial.

5

Outcome assessment for clinical trials: how many adjudicators do we need? Canadian Lung Oncology Group.

Walter SD, Cook DJ, Guyatt GH, King D, Troyan S. Walter SD, et al. Control Clin Trials. 1997 Feb;18(1):27-42. doi: 10.1016/s0197-2456(96)00131-6. Control Clin Trials. 1997. PMID: 9055050 Clinical Trial.

6

Sample size and optimal designs for reliability studies.

Walter SD, Eliasziw M, Donner A. Walter SD, et al. Stat Med. 1998 Jan 15;17(1):101-10. doi: 10.1002/(sici)1097-0258(19980115)17:1<101::aid-sim727>3.0.co;2-e. Stat Med. 1998. PMID: 9463853

7

Estimating the number needed to treat (NNT) index when the data are subject to error.

Walter SD, Irwig L. Walter SD, et al. Stat Med. 2001 Mar 30;20(6):893-906. doi: 10.1002/sim.707. Stat Med. 2001. PMID: 11252011

8

Number needed to treat (NNT): estimation of a measure of clinical benefit.

Walter SD. Walter SD. Stat Med. 2001 Dec 30;20(24):3947-62. doi: 10.1002/sim.1173. Stat Med. 2001. PMID: 11782045

9

Estimation, power and sample size calculations for stochastic cost and effectiveness analysis.

Walter SD, Gafni A, Birch S. Walter SD, et al. Pharmacoeconomics. 2007;25(6):455-66. doi: 10.2165/00019053-200725060-00002. Pharmacoeconomics. 2007. PMID: 17523751 Review.

10

A geometric confidence ellipse approach to the estimation of the ratio of two variables.

Walter SD, Gafni A, Birch S. Walter SD, et al. Stat Med. 2008 Dec 10;27(28):5956-74. doi: 10.1002/sim.3398. Stat Med. 2008. PMID: 18720350

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