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 |