Skip to main content

Table 1 Characteristics of the participants

From: Association of vitamin K, fibre intake and progression of periodontal attachment loss in American adults

Quartiles of PERIO

Q1 (n = 967)

Q2 (n = 1073)

Q3 (n = 1658)

Q4 (n = 1267)

P value

Age (years)

42.3413 ± 10.6764

54.5396 ± 14.2871

57.7376 ± 13.6435

57.8587 ± 12.3326

 < 0.001

BMI

28.8750 ± 6.5105

29.9104 ± 6.4273

29.6258 ± 6.8878

29.0708 ± 6.6225

 < 0.001

Vitamin K

5.9959 ± 1.1846

5.7870 ± 1.309864

5.7358 ± 1.2727

5.6458 ± 1.2683

 < 0.001

Fibre

7.3291 ± 2.3188

6.8323 ± 2.4048

6.7402 ± 2.4201

6.5978 ± 2.4502

 < 0.001

Gender

    

 < 0.001

 Male

416 (43.0196%)

550 (51.2582%)

925 (55.7901%)

856 (67.5612%)

 

 Female

551 (56.9804%)

523 (48.7418%)

733 (44.2099%)

411 (32.4388%)

 

Race

    

 < 0.001

 Mexican American

101 (10.4447%)

167 (15.5638%)

260 (15.6815%)

254 (20.0474%)

 

 Other Hispanics

74 (7.6525%)

125 (11.6496%)

172 (10.3739%)

109 (8.6030%)

 

 Non-Hispanic Whites

551 (56.9804%)

431 (40.1678%)

688 (41.4958%)

452 (35.6748%)

 

 Non-Hispanic Blacks

117 (12.0993%)

240 (22.3672%)

397 (23.9445%)

335 (26.4404%)

 

 Other races

124 (12.8232%)

110 (10.2516%)

141 (8.5042%)

117 (9.2344%)

 

Education

    

 < 0.001

 Below Grade 9

36 (3.7736%)

101 (9.6651%)

174 (10.6880%)

183 (14.7343%)

 

 Grades 9–11

47 (4.9266%)

140 (13.3971%)

278 (17.0762%)

238 (19.1626%)

 

 High school graduate

130 (13.6268%)

235 (22.4880%)

402 (24.6929%)

349 (28.0998%)

 

 College/AA degree

279 (29.2453%)

286 (27.3684%)

443 (27.2113%)

298 (23.9936%)

 

 College degree or above

460 (48.2180%)

281 (26.8900%)

320 (19.6560%)

170 (13.6876%)

 

 Refused to answer

1 (0.1048%)

0 (0.0000%)

3 (0.1843%)

0 (0.0000%)

 

 Do not know

1 (0.1048%)

2 (0.1914%)

8 (0.4914%)

4 (0.3221%)

 
  1. BMI Body mass index, vitamin K (log2-transformed), fibre (log2-transformed)
  2. Mean ± SD for continuous variables: P value was calculated by the weighted linear regression model
  3. % for categorical variables: P value was calculated by weighted chi-square test