[Table/Fig-3]:

Distribution of cases according to group.

Group	No. of cases	No. of positive case	Normal scan	Chi-Square Value	p-value
A	48	29 (60.4%)	19 (39.6%)	34.9	0.001(HS)
B	452	97 (21.5%)	355 (78.5%)
Total	500	126	374