European Journal of Scientific Research - EuroJournals

323 Nadia Saeed, Muhammad Khalid Pervaiz and Muhammad Qaiser Shahbaz
References
[1] Beal SL. Sample Size Determination for Confidence Intervals on the Population Mean and on
the Difference Between Two Population Means. Biometrics 1989; 45:969-77.
[2] Birkett MA, Day SJ. Internal Pilot Studies for Estimating Sample Size. Statistics in
Medicine1994; 13:2455-2463.
[3] Boen, J. R. and Zahn, D. A. (1982), The Human Side of Statistical Consulting, Lifetime
Learning Publications, Belmont, CA.
[4] Borenstein, M., Rothstein, H., and Cohen, J. (1997), Power and Precision, Biostat, Teaneck, NJ,
Software for MS-DOS systems.
[5] Browne RH. On the use of a Pilot Sample for Sample Size Determination. Statistics in
Medicine 1995; 14:1933-1940.
[6] Buderer NMF. Statistical Methodology: I. Incorporating the Prevalence of Disease into the
Sample Size Calculation for Sensitivity and Specificity. Academic Emergency Medicine 1996;
3:895-900.
[7] Bull SB. Sample Size and Power Determination for a Binary Outcome and an Ordinal Exposure
when Logistic Regression Analysis is Planned. American Journal of Epidemiology 1993;
137:676-684.
[8] Castelloe, J. (2000), “Sample Size Computations and Power Analysis with the SAS System,” in
Proceedings of the Twenty-Fifth Annual SAS User’s Group International Conference, Cary,
NC, SAS Institute, Inc., Paper 265-25.
[9] Casagrande JT, Pike MC, Smith PG. An Improved Approximate Formula for Calculating
Sample Sizes for Comparing Two Binomial Distributions. Biometrics 1978; 34:483-486.
[10] Chochran, W.G., Sampling Technque s, John Wiley & Sonns, New York, (1977).
[11] Cohen J. Statistical Power Analysis for the Behavioral Sciences. New York: Academic Press,
1969.
[12] Cohen, J. (1988), Statistical Power Analysis for the Behavioral Sciences, Academic Press, New
York, 2 nd ed.
[13] Day SJ, Graham DF. Sample Size Estimation for Comparing Two or More Treatment Groups
in Clinical Trials. Statistics in Medicine 1991; 10:33-43.
[14] Detsky AS, Sackett DL. When was a "negative" clinical trial big enough? How many patients
do you need depends on what you have found? Arch Intern Med 1985; 145:709.
[15] Desu, M. M. and Raghavarao, D. (1990), Sample Size Methodology, Academic Press, Boston.
[16] Dupont WD. Power Calculations for Matched Case-Control Studies. Biometrics 1988;44:1157-
1168
[17] Elashoff, J. (2000), nQuery Advisor Release 4.0, Statistical Solutions, Cork, Ireland, Software
for MS-DOS systems.
[18] Eng J. Sample size estimation: how many individuals should be studied? Radiology 2003;
227:309.
[19] Eng J, Siegelman SS. Improving radiology research methods: what is being asked and who is
being studied? Radiology 1997; 205:651-655.
[20] Feiveson AH. Power by simulation. STATA J 2002; 2:107.
[21] Feigl P. A Graphical Aid for Determining Sample Size When Comparing Two Independent
Proportions. Biometrics 1978; 34:111-122.
[22] Flack VF, Eudey TL. Sample Size Determinations Using Logistic Regression with Pilot Data.
Statistics in Medicine 1993; 12:1079-1084.
[23] Freiman, J. A., Chalmers, T. C., Smith, Jr., H., and Kuebler, R. R. (1986), “The Importance of
Beta, the Type II Error, and Sample Size in the Design and Interpretation of the Randomized
Controlled Trial: Survey of 71 “Negative” Trials,” in Medical Uses of Statistics, eds. J. C.
Bailar III and F. Mosteller, chap. 14, pp. 289–304, NEJM Books, Waltham, Mass.
[24] Fleiss JL. Statistical Methods for Rates and Proportions. Second Edition. New York: Wiley &
Sons, 1981.