The phrase "a twofold risk" is correct and usable in written English.
It can be used when discussing a situation that presents two distinct types of risks or dangers.
Example: "The project involves a twofold risk: financial loss and reputational damage."
Alternatives: "a dual risk" or "a double risk".
What should I make of the nonsensical news that I am "probably light-skinned" but have a "twofold risk of baldness"?
After controlling for various factors, the team found that drinking two or more colas a day — whether artificially sweetened or regular — was linked to a twofold risk of chronic kidney disease.
Dr. Rashimi Sinha, a researcher at the National Cancer Institute, said, "We found a twofold risk of breast cancer in women who consumed very-well-done red meat as compared to rare or medium".
The use of nutritional supplements by athletes is associated with a twofold risk, first to use adulterated supplements, either by accidental contamination or by deliberate spiking, and second to use prohibited substances with doping being viewed as a gradual progression from the use of nutritional supplements to the misuse of harder drugs.
Interestingly, increased risk of CHD was primarily attributable to a twofold risk of angina.
Despite this, there was sufficient statistical power in the study to detect a twofold risk increase.
In the multivariate analyses adjusting for potential confounders, a nearly twofold risk (OR 1.8; 95% CI 1.5-2.3 1.5-2.3veloping CDH was forndevelopinge with CDHCs at baseline.
Previous Ottman and Lipton's studies on 1948 patients with epilepsy demonstrated a twofold higher risk for migraine in patients with epilepsy compared to their first degree relatives without epilepsy, and they also showed a nearly twofold risk of migraine compared to controls (24%% vs 12%%).
Also it has been noted that patients' age is not a risk factor for dislocation [1, 36], but Ekelund et al. [38] found a nearly twofold risk of dislocation among very old patients (above 80 years).
A nearly twofold risk of mortality in opium users is substantial and is stronger than the estimated risk posed by tobacco use in this population.
In ACCORD, probable major depression was associated with an approximate twofold risk of all-cause mortality.
