Table 5.

Generalized linear model for the effects of the demographic characteristics, treatment strategies, furcation–ABC relationship, and AIDR on the outcome of FDR in the combined furcation–angular defect group. The data was adjusted by age.

	LFI		RLI		ALF		ARL		IRI
	Estimate ± SD	p	Estimate ± SD	p	Estimate ± SD	p	Estimate ± SD	p	Estimate ± SD	p
Male vs. female	0.12 ± 0.30	0.690	8.20 ± 8.58%	0.340	−0.02 ± 0.34	0.966	1.20 ± 10.08%	0.908	−0.03 ± 0.04	0.406
DBBM vs. autograft/FDBA	0.21 ± 0.32	0.508	−2.00 ± 9.13%	0.823	0.23 ± 0.37	0.537	5.80 ± 10.72%	0.586	0.00 ± 0.04	0.941
EMD vs. CM	0.30 ± 0.31	0.328	9.70 ± 8.96%	0.278	0.21 ± 0.36	0.563	6.10 ± 10.52%	0.565	0.07 ± 0.04	0.110
FF-ABC ≥ 0.5 mm vs. <0.5 mm	−0.43 ± 0.33	0.195	−4.10 ± 9.54%	0.665	−0.06 ± 0.38	0.882	1.30 ± 11.21%	0.905	0.06 ± 0.05	0.232
BF-ABC ≥ 0.5 mm vs. <0.5 mm	−0.49 ± 0.42	0.248	−0.80 ± 12.23%	0.950	−0.19 ± 0.49	0.701	−3.20 ± 14.37%	0.822	0.02 ± 0.05	0.685
AIDR > 0 mm vs. AIDR ≤ 0 mm	0.42 ± 0.31	0.181	9.10 ± 9.01%	0.311	1.23 ± 0.36	0.001 **	30.3 ± 5.10%	0.004 **	0.10 ± 0.04	0.027 *

Abbreviations: LFI: the linear furcation regeneration improvement; RLI: the ratio of LFI; ALF: the adjusted LFI; ARL: the adjusted ratio of LFI; IRI: the improvement of radiographic intensity; BRG: the bone replacement graft; FDBA: freeze-dried bone matrix; DBBM: deproteinized bovine bone matrix; CM: collagen membrane; EMD: enamel matrix derivatives; FF-ABC: the distance between FF and ABC; AIDR: the adjacent intrabony defect regeneration. Significant difference: * p < 0.05, ** p < 0.01.