Table 3.

Relationship between dietary fibre intake and periodontal attachment loss progression

	Model 1 β (95% CI) P value	Model 2 β (95% CI) P value	Model 3 β (95% CI) P value
Fibre	-0.0009 (-0.0014, -0.0005) 0.000008	-0.0008 (-0.0012, -0.0004) 0.000050	-0.0008 (-0.0012, -0.0004) 0.000190
Quartiles of fibre
Q1 (0.00–19.35 mg)	0	0	0
Q2 (19.40–238.65 mg)	-0.0288 (-0.1123, 0.0546) 0.498731	-0.0448 (-0.1204, 0.0308) 0.245495	-0.0080 (-0.0815, 0.0656) 0.832138
Q3 (238.70–469.55 mg)	-0.1536 (-0.2374, -0.0697) 0.000333	-0.1545 (-0.2308, -0.0781) 0.000075	-0.1249 (-0.1996, -0.0502) 0.001051
Q4 (470.25–2428.85 mg)	-0.2812 (-0.3641, -0.1984) < 0.000001	-0.2170 (-0.2924, -0.1415) < 0.000001	-0.1695 (-0.2429, -0.0960) 0.000006
P trend	< 0.001	< 0.001	< 0.001
Stratified by gender
Male	-0.0012 (-0.0018, -0.0007) 0.000009	-0.0010 (-0.0015, -0.0005) 0.000298	-0.0010 (-0.0015, -0.0004) 0.000374
Female	-0.0008 (-0.0014, -0.0002) 0.008639	-0.0005 (-0.0011, 0.0001) 0.116644	-0.0004 (-0.0010, 0.0002) 0.232311
Stratified by race
Mexican American	-0.0012 (-0.0023, -0.0001) 0.029996	-0.0012 (-0.0023, -0.0002) 0.020879	-0.0012 (-0.0023, -0.0002) 0.023186
Other Hispanics	-0.0009 (-0.0020, 0.0003) 0.134178	-0.0008 (-0.0019, 0.0002) 0.128930	-0.0008 (-0.0018, -0.0003) 0.159892
Non-Hispanic Whites	-0.0013 (-0.0019, -0.0008) 0.000002	-0.0012 (-0.0017, -0.0007) 0.000014	-0.0012 (-0.0018, -0.0007) 0.000010
Non-Hispanic Blacks	0.0004 (-0.0007, 0.0014) 0.480656	0.0003 (-0.0007, 0.0013) 0.543631	0.0005 (-0.0005, 0.0016) 0.293950
Other races	-0.0006 (-0.0022, 0.0011) 0.503325	-0.0005 (-0.0021, 0.0011) 0.568293	-0.0003 (-0.0019, 0.0013) 0.714169

Model 1: No covariates were adjusted

Model 2: Age, gender, and race were adjusted

Model 3: Adjusted for all variables listed in Table 1