Comparative evaluation of effect of injectable platelet-rich fibrin with collagen membrane compared with collagen membrane alone for gingival recession coverage

Table 12 Intergroup comparison of mean relative attachment level scores between injectable platelet-rich fibrin + collagen membrane at different time intervals using Mann-Whitney U test

Time (mo)	Group	n	mean ± SD	P value
0	i-PRF + CM	20	7.3 ± 0.801	0.429
	CM	20	7.05 ± 0.826	NS
1	i-PRF + CM	20	5.65 ± 1.348	0.620
	CM	20	5.4 ± 0.94	NS
3	i-PRF + CM	20	5.25 ± 1.293	0.779
	CM	20	5.05 ± 0.945	NS
6	i-PRF + CM	20	5.55 ± 1.099	0.779
	CM	20	5.45 ± 0.826	NS

Level of significance at P < 0.05. CM: Collagen membrane; i-PRF: Injectable platelet-rich fibrin; NS: Not significant using Mann-Whitney U test.