Sentence examples for severe confounding by from inspiring English sources

However, it should be noted that association of HSCs with anemia lost significance in multivariate model and severe confounding by gestational age was observed.

Severe confounding by socioeconomic differences between statin users and non-users is unlikely given the tax-financed Danish public health care system [ 53, 54].

Socioeconomic factors have not been adjusted for, but severe confounding by socioeconomic differences seems unlikely because statin prescriptions are reimbursed, and access to hospital treatment is the same for all citizens in Norway.

To examine severity of injuries in the current analysis, the analysis was restricted to cases only, comparing participants with more severe injuries to those with less severe injuries, introducing the potential for confounding by personal and trip characteristics.

Frailty selection, resulting in confounding by severity, can be important in VE studies focussing on severe disease or hospitalisation as outcome [ 30, 31].

The results from earlier trials that addressed the impact of more severe endometriosis were confounded by the use of laparoscopic retrieval techniques which, in the face of distorted anatomy and dense pelvic adhesions, may have limited the ability to adequately retrieve oocytes in patients with more extensive disease [ 1].

Confounding by disease severity, whereby patients with more-severe disease (and thus at a higher risk of infection) are more likely to receive steroids, was a major concern.

Air pollution concentrations may also be elevated during extreme and severe heat events and so potential confounding by air pollution was assessed by conducting sensitivity analyses that included air pollutants (PM10 (24 hour average), PM2.5 (24 hour average), NO2 (1 hour maximum) and O3 (1 hour maximum)) separately in the models.

This analysis limited confounding by severity [ 25].

Furthermore, there is strong selection bias for glucocorticoid use because physicians are inclined to treat patients with more severe disease with (higher dosages of) glucocorticoids (confounding by indication).

Perhaps patients with multiple antihypertensive drugs have a more severe and/or refractory hypertension, i.e. confounding by indication in non-randomized cohort studies.