Sentence examples similar to matched controls assumes from inspiring English sources

The lack of time-matched controls assumes that the background MF would be unaltered by the intratracheal surgery.

In many candidate gene studies, the frequencies of the three genotypes at a given candidate locus are assayed in population-based breast cancer cases and matched controls, and, assuming a dominant genetic model, the relative risk of breast cancer for individuals with the heterozygote or minor allele homozygote genotypes are calculated using the common allele homozygotes as the baseline.

With 59 cases and four matched controls for each case, a 5% significance level, and assuming a correlation of 0.2 for exposure between cases and matched controls, the study had 89% power to detect an odds ratio of 3 or more when 20% of controls are exposed, and 74% power when 10% of controls are exposed.

We determined a priori that our study with 400 sporadic CRC cases and 400 matched controls would enable us to detect an OR of 2.0 for 9A/6A heterozygous individuals (assuming a frequency of 0.15 in controls) and an OR of 3.0 for 6A/6A homozygous individuals (assuming a frequency of 0.0175 in controls) with 80% power (two-sided test, alpha level = 5%).

Critically ill patients, assumed to require > 10 days of intensive care, were compared with healthy matched controls and randomly allocated to a daily vitamin D supplement of either ± 200 IU (low dose) or ± 500 IU (high dose).

Design: Experimental, with matched controls.

Time matched controls were treated with DMSO.

There were 498 matched controls.

We identified 104,524 matched controls.

p < 0.05 matched controls vs. healthy controls.

Assuming the data prove to be normally distributed, standard parametric testing will be used to compare the mean QALYs in ICU survivors with the age and sex matched controls held in other databases.