Statistical versus clinical significance for infants with brain injury: reanalysis of outcome data from a randomized

Lina Kurdahi Badr1

  • 1Azusa Pacific University, CA. linakbadr@hotmail.com

By adopting more appropriate statistical methods to appraise data from a previously published randomized controlled trial, the statistical and clinical significance of an intervention on the 18-month neurodevelopmental outcome of infants with suspected brain injury is evaluated. The intervention group (n = 32) receives extensive, individualized cognitive/sensorimotor stimulation by public health nurses while the control group (n = 30) receives standard follow-up care. At 18 months, 43 infants remain in the study (22 intervention and 21 control). The results indicate that there is a significant statistical change within groups and a clinical significance whereby more infants in the intervention group improve in mental, motor, and neurological functioning at 18 months compared to the control group. The benefits of looking at clinical significance from a meaningful aspect for practitioners are emphasized.

Related Concept Videos

Statistical Significance01:37

Statistical Significance

Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...