Abstract
Aim and Objective: To find the variation of lateral ventricle brain ratios, namely, frontal horn ratio, bicaudate ratio, and Evan’s ratio with respect to gender and age and discuss their clinical relevance.
Material and method: Head CT images collected from department of radiology and imaging, G.B. Pant Hospital, of 120 patients, with age range 5-75 years (64 males, mean age 34.3+/-16.4 yrs. and 56 females, mean age 38.1+/-14.08 yrs.) were analysed by dicom image software for morphometric measurements after taking the institutional ethical committee clearance. Mean and standard deviation were calculated for each parameter. Lilliefors test was used to check normality of data. Independent sample t-test was used to find difference in males and female for bicaudate ratio (BCR) and Evan’s ratio(ER). Mann-Whitney U test was applied for frontal horn ratio (FHR) in two tailed analysis. Significance level was taken as 0.05. Regression analysis was applied to find correlation with age.
Results: Mean FHR was 0.30 with higher variation in females, difference being statistically nonsignificant (p >0.05). BCR and ER showed significant difference between two genders, values being higher in males. Regression correlation coefficient for FHR, BCR and ER with age was -0.093, 0.420 and 0.2164 respectively.
Conclusions: FHR does not change with age and is same in males and females. BCR moderately increases with age and is slightly higher in males whereas Evan’s Ratio shows mild nonsignificant correlation with age and is higher in males.

Key words: lateral ventricle brain ratio, bi-caudate ratio, Evan’s ratio, Frontal horn ratio.