Meanings of slight predominance in English

P(A)SC exhibit a peak of incidence in the older child, typically in pre-pubertal age with a slight predominance of male gender.

The higher incidence of end-stage renal disease among males and the slight predominance of females in the general population did not explain these gender disparities.

In the group only a slight predominance of men over women was found (1.1:1), the median age was 63 years.

The median age of patients was 51 years (range 19-79 years), with slight predominance of women (female to male ratio 1.2:1).