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
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
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

Model 1: No covariates were adjusted

Model 2: Age, gender, and race were adjusted

Model 3: Adjusted for all variables listed in Table 1