The phrase "a significant relative" is correct and usable in written English.
It can be used when referring to a family member or relation that holds considerable importance or influence in a particular context.
Example: "In the study of genetics, a significant relative can provide valuable insights into hereditary traits."
Alternatives: "an important relative" or "a notable relative".
We had high power (99.5% at the 0.05 significance level) to detect a significant relative risk of 2.0 among postmenopausal women, but we had low power (47.1%) to detect the same magnitude of association among premenopausal women.
A significant relative displacement may occur and leads to the assembly failure.
Rietveld refinements against X-ray and neutron powder diffraction data revealed a significant relative compression in the stacking axis (c-axis) of the new compound.
Four of the seven studies that analysed the effect on ADEs showed a significant relative risk reduction of 30%to84%4%.
Of the 25 studies that analysed the effects on the medication error rate, 23 showed a significant relative risk reduction of 13%to99%9%.
Six of the nine studies that analysed the effects on potential ADEs showed a significant relative risk reduction of 35%to98%8%.
Descent of the fetal head during the second stage of labor is associated with a significant relative thickening of the anterior and fundal myometrium.
First, successful innovations are perceived to have a significant relative advantage over current alternatives.
Using the univariate logistic model, factors with a significant relative risk value, p = 0.05, were identified (Table 4).
Indeed, a significant relative bias of IRAS galaxies to optical ones was found (e.g., Babul and Postman, 1990; Lahav et al., 1990; Peacock and Dodds, 1994).
In other words, even if a significant relative age effect is observed in a country, the popularity and system of a sport differ among sports and countries.
