Sentence examples for a high selection bias from inspiring English sources

This may mainly be due to a high selection bias and low response rates in mail surveys.

However, most of the patients with peptic ulcer history in our region are infected with Helicobacter pylori and including such cases would have represented a higher selection bias.

All these factors can produce high selection bias, performance bias and measuring bias.

For observational studies, three areas of potential bias were graded as low, unclear or high: selection bias, information bias and confounding.

Participation rate was high, selection bias limited, observation period long and the evaluation of morbidity changes was based on assessment of full-text hospital records.

Since our target population consists of patients who are high care users, who are more willing to participate than patients who receive for example assertive outreach [ 9], we do not expect high selection bias.

Since ascertainment of cases and controls in our study was high, selection bias may only explain our findings if the small proportion of non-participating cases were overwhelmingly drinkers of "cold tea" or, conversely, the non-participating controls were overwhelmingly drinkers of "hot tea".

1 10 Their low-risk population and primarily the high selection bias in GRAVITAS 7 and TRIGGER-PCI, 9 with patient inclusion more than 12 h after PCI, seem to cloud the potential importance of optimising platelet inhibition at the time of PCI.

Even residues common in the population are less likely to be transmitted to healthy men than to women, indicative of higher selection bias in woman-to-man transmission.

The results also show that higher entry criteria, lower between-subject variances, and higher within-subject variances cause higher selection biases.

All studies were in intensive care, with either a high risk of selection bias or high applicability concerns.