highly significantP < 0.05
Intergroup comparison between Groups 1 and 2 and between Groups 1 and 4 shows mean difference of 6.59 and −7.53, respectively, which was statistically significant ( P < 0.05), whereas comparison of Group 2 with Group 3 and comparison of Group 2 with Group 4 show mean difference −11.14 and −14.13 which was statistically highly significant ( P < 0.05).