Effect of periodontal therapy on lung function: a twelve-month follow-up intervention study

Respiratory Research

Table 3 Absolute lung function measurements by spirometry and forced oscillation technique from baseline (T0) to twelve-month follow-up (T3)

Variables	T0	T1	p-value	SPC1	p-value	T2	p-value	SPC2	p-value	T3	p-value
Variables	n = 62	n = 57	p-value	n = 55	p-value	n = 52	p-value	n = 50	p-value	n = 48	p-value
Spirometry
FEV₁ in L (SE)	3.55 (0.09)	3.53 (0.09)	0.35	3.54 (0.09)	0.62	3.55 (0.09)	0.92	3.55 (0.09)	0.86	3.54 (0.09)	0.74
FVC in L (SE)	4.53 (0.13)	4.53 (0.13)	0.86	4.54 (0.13)	0.68	4.54 (0.13)	0.63	4.55 (0.13)	0.29	4.55 (0.13)	0.43
FEV₁/FVC (SE)	0.786 (0.008)	0.781 (0.008)	0.07	0.783 (0.008)	0.2	0.785 (0.008)	0.55	0.784 (0.008)	0.37	0.782 (0.008)	0.16
Oscillometry
R₅ (SE)	3.22 (0.13)	3.10 (0.13)	0.1	2.97 (0.13)	0.001	2.98 (0.13)	0.001	3.00 (0.13)	0.002	2.92 (0.13)	< 0.001
R₁₁ (SE)	3.00 (0.10)	2.86 (0.10)	0.01	2.77 (0.10)	< 0.001	2.77 (0.10)	< 0.001	2.77 (0.10)	< 0.001	2.75 (0.10)	< 0.001
R₁₉ (SE)	2.78 (0.08)	2.63 (0.08)	0.005	2.59 (0.08)	< 0.001	2.60 (0.08)	0.001	2.57 (0.08)	< 0.001	2.59 (0.08)	0.001
R₅-R₂₀ (SE)	0.45 (0.07)	0.47 (0.08)	0.63	0.39 (0.08)	0.19	0.37 (0.08)	0.11	0.43 (0.08)	0.6	0.33 (0.08)	0.02
F_res (SE)	16.73 (0.60)	16.90 (0.61)	0.72	16.31 (0.62)	0.3	16.04 (0.62)	0.09	16.57 (0.62)	0.69	16.18 (0.63)	0.19
X₅ (SE)	-1.29 (0.06)	-1.24 (0.06)	0.26	-1.15 (0.06)	0.002	-1.14 (0.06)	0.001	-1.12 (0.06)	< 0.001	-1.12 (0.06)	< 0.001
AX (SE)	7.66 (0.73)	7.84 (0.75)	0.71	6.86 (0.75)	0.1	6.33 (0.76)	0.008	6.87 (0.76)	0.11	6.30 (0.77)	0.008
FeNO (SE)	19.01 (1.62)	18.34 (1.62)	0.525	18.16 (1.65)	0.424	18.12 (1.67)	0.413	19.00 (1.68)	0.986	18.41 (1.70)	0.602

ISSN: 1465-993X