The phrase "a difference in prevalence" is correct and usable in written English.
It can be used when discussing variations in the occurrence or frequency of a particular phenomenon or condition within different groups or settings.
Example: "The study revealed a difference in prevalence of the disease between urban and rural populations."
Alternatives: "a variation in occurrence" or "a disparity in frequency."
A difference in prevalence between studies where fibroids intended to be morcellated and the older (pathology) studies where all uteri and fibroids served as a denominator in the prevalence rate has also been demonstrated [27].
Assuming a difference in prevalence of 12%, using a power of 0.80 and a significance level of 5%, a minimum of 280 patients without side shift had to be included in the present study.
[8] Based on previous studies demonstrating increased susceptibility to P. aeruginosa based on ABH group [16], and increased affinity of P. aeruginosa for CF respiratory and salivary mucins [36], [38] [41], we hypothesized that there would be a difference in prevalence of the ABH antigens amongst those patients with earlier colonization with P. aeruginosa.
There was no evidence for a difference in prevalence of severe hypertension (>160/95 mmHg) between the sexes (25% in men and 26% in women respectively, p = 0.7), but there was evidence that tall R waves (associated with LVH) were more common in men (34%) than in women (10%) respectively, (p<0.0001).
A difference in prevalence of primary lung lesions was noted between males versus female subpopulation.
Chi square was used to asses a difference in prevalence in case of a dichotomous outcome.
However, while there was a difference in the prevalence of annual rhythmicity, there was no difference in the prevalence of circadian rhythmicity between the two patient groups (ECH: 83.4 % vs. CCH: 79.5 %, P = 0.4332).
Low diarrhea prevalence in control clusters reduced our power to detect a difference in diarrhea prevalence attributable to the intervention.
The difference in the prevalences among these studies might be explained by a difference in the prevalence found in the general population in each studied city.
Our data did not show a difference in the prevalence of depression between the motor subtypes and showed a trend towards higher prevalence of depression in the tremor dominant group.
This difference most probably occurred because of a difference in lesion prevalence in the FOBT groups, which can result in a different proportion of false positives.
