Table 5.

Pair-wise comparison between gcf and serum among the groups (mann-whitney u test)

Variable	n	Mean rank	Sum of ranks	Mann-Whitney U	Z	P
GROUP A GCF	10	15.50	155	0	-3.780	<0.001*
GROUP A SERUM	10	5.50	55
GROUP B GCF	10	15.40	154	1	-3.705	<0.001*
GROUP B SERUM	10	5.60	56
GROUP C GCF	10	15.20	152	3	-3.554	<0.001*
GROUP C SERUM	10	5.80	58
GROUP D GCF	10	14.90	149	6	-3.326	<0.001*
GROUP D SERUM	10	6.10	61
Inference	Statistically significant difference is seen in all the groups.