Sentence examples for because the effective sample from inspiring English sources

This lack of independence may distort the statistical analyses – particularly the estimation of standard errors [71], because the effective sample size decreases with increasing similarity among the units of analysis (i.e., the samples of a single study).

Such loss could introduce bias "if the unavailability of data is associated with the likelihood of outcome events" or reduce power "because the effective sample size is reduced".

A direct and intuitive consequence of the heterogeneity would be a weakened test power because the effective sample size for detecting the marker-disease association at a test site is actually reduced when compared to the census sample size.

However, data from the 1996 1997 NPHS were used for most of the analyses because the effective sample of 61,879 allowed more precise estimates than other NPHS cycles (This sample size accounts for approximately 7,500 records in which the two-day detailed drug data were not coded).

To maximise our sample size, we had to remove hypercholesterolaemia from the logistic regression models because its inclusion reduced the effective sample size by over 50%.

Moreover, confidence intervals for NNTs will be too narrow if censoring is not taken into account because the values used for the effective sample sizes are too large.

This type of clustering is likely to affect the effect estimates because it will inflate the standard error and reduce the effective sample size, thus reducing the power of the trial [ 13, 14].

The subject's overall characteristics can be found in Additional file 2. Although the primary analysis set was less than the calculated sample size, the representativeness of the effective sample was not affected, because the sample size was based on the theoretically possible number of unique symptom profiles and the included subjects presented approximately 1400 different profiles.

All 1,236 patients were used in the evaluation of strategy G, but for all other strategies the effective sample size was reduced because of missing data in some of the patient records.

However, because the average genotyping rate was 95.1%, the effective sample sizes varied among loci and averaged approximately 159 samples.

This is because genome-wide-association studies (GWAS), as we are going to describe in detail, usually require relatively unrelated individuals, and in twins, the effective sample size is halved and would not reach one thousand.