Table 2 Association between vitamin K 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 |
|---|---|---|---|
Vitamin K | -0.0014 (-0.0026, -0.0002) 0.022052 | -0.0016 (-0.0028, -0.0005) 0.006438 | -0.0009 (-0.0021, 0.0002) 0.123073 |
Quartiles of Vitamin K | |||
 Q1 (0.75–31.20 mg) | 0 | 0 | 0 |
 Q2 (31.30–53.10 mg) | -0.0388 (-0.1223, 0.0446) 0.361802 | -0.0686 (-0.1441, 0.0068) 0.074658 | -0.0271 (-0.1010, 0.0468) 0.472478 |
 Q3 (53.15–93.35 mg) | -0.1991 (-0.2825, -0.1157) 0.000003 | -0.1894 (-0.2649, -0.1138) < 0.000001 | -0.1058 (-0.1800, -0.0316) 0.005237 |
 Q4 (93.45–1605.50 mg) | -0.2477 (-0.3312, -0.1643) < 0.000001 | -0.2342 (-0.3100, -0.1584) < 0.000001 | -0.1181 (-0.1930, -0.0433) 0.001982 |
P trend |  < 0.001 |  < 0.001 | 0.010 |
Stratified by gender | Â | Â | Â |
 Male | -0.0012 (-0.0028, 0.0005) 0.173894 | -0.0012 (-0.0028, 0.0004) 0.146590 | -0.0005 (-0.0021, 0.0011) 0.531508 |
 Female | -0.0023 (-0.0040, -0.0007) 0.005283 | -0.0023 (-0.0040, -0.0007) 0.004573 | -0.0014 (-0.0030, 0.0002) 0.084140 |
Stratified by race | Â | Â | Â |
 Mexican American | -0.0020 (-0.0075, 0.0034) 0.462763 | -0.0026 (-0.0079, 0.0027) 0.338067 | 0.0016 (-0.0070, 0.0038) 0.557883 |
 Other Hispanics | -0.0032 (-0.0073, 0.0009) 0.123363 | -0.0022 (-0.0061, 0.0018) 0.286774 | -0.0009 (-0.0048, 0.0031) 0.669704 |
 Non-Hispanic Whites | -0.0013 (-0.0030, 0.0004) 0.143690 | -0.0015 (-0.0032, 0.0002) 0.083340 | -0.0002 (-0.0019, 0.0015) 0.806674 |
 Non-Hispanic Blacks | -0.0006 (-0.0029, 0.0017) 0.592771 | -0.0014 (-0.0037, 0.0008) 0.199793 | -0.0017 (-0.0039, 0.0005) 0.131520 |
 Other races | -0.0017 (-0.0053, 0.0020) 0.369406 | -0.0016 (-0.0052, 0.0020) 0.386952 | -0.0003 (-0.0039, 0.0032) 0.851076 |