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Table 1 Demographic characteristics of the total population in NHANES 2009–2014 (N = 3248)

From: Association of per- and polyfluoroalkyl substances (PFAS) with periodontitis: the mediating role of sex hormones

Characteristics

Total

N = 3248

Participants with no periodontitis

n = 1605 (58.8%)

Participants with periodontitis

n = 1643 (41.2%)

P value

Continuous variables, mean (SD)

    

Age (years)

50.79(0.31)

48.21(0.49)

54.48(0.42)

< 0.001

Alcohol intake (drinks/day)

2.47(0.06)

2.24(0.06)

2.80(0.10)

< 0.001

Poverty income ratio, PIR

3.14(0.05)

3.45(0.06)

2.71(0.06)

< 0.001

Serum Cotinine (ng/mL)

49.42(3.11)

33.30(2.97)

72.44(4.81)

< 0.001

Categorical variables, n (%)

    

Age group

   

< 0.001

 Youth and middle (Age ˂ 65)

2538(82.1)

1359(86.6)

1179(75.7)

 

 Old (Age ≥ 65)

710(17.9)

246(13.4)

464(24.3)

 

Sex

   

< 0.001

 Male

1599(49.2)

657(43.3)

942(57.5)

 

 Female

1649(50.8)

948(56.7)

701(42.5)

 

BMI (kg/m2)

   

0.241

 Normal

881(27.5)

454(28.8)

427(25.6)

 

 Overweight

1139(35.3)

559(35.2)

580(35.4)

 

 Obese

1228(37.3)

592(36.0)

636(39.1)

 

Race/ethnicity

   

< 0.001

 Non-Hispanic White

1418(69.1)

832(75.8)

586(59.6)

 

 Non-Hispanic Black

627(9.9)

237(7.2)

390(13.8)

 

 Mexican American

471(8.1)

156(5.0)

315(12.5)

 

 Other

732(12.8)

380(12.0)

352(14.1)

 

Educational attainment

   

< 0.001

 Less than High school

792(15.9)

229(9.2)

563(25.5)

 

 High school and college or above

2456(84.1)

1376(90.8)

1080(74.5)

 

Marital status

   

< 0.001

 Married

1945(64.2)

1035(69.4)

910(56.9)

 

 Unmarried but have/had partner

937(25.6)

382(20.9)

555(32.3)

 

 Never married

366(10.2)

188(9.7)

178(10.9)

 

Smoking status

   

< 0.001

 Never

1858(57.3)

1035(63.7)

823(48.1)

 

 Former

813(25.7)

368(24.6)

445(27.3)

 

 Current

577(17.0)

202(11.7)

375(24.6)

 

Milk product consumption

   

0.349

 Never

585(16.8)

279(16.4)

306(17.3)

 

 Rarely-less than once a week

508(14.9)

271(15.8)

237(13.7)

 

 Sometimes-once a week or more, but less than once a day

910(27.2)

456(27.7)

454(26.4)

 

 Often-once a day or more

1231(40.6)

592(39.5)

639(42.3)

 

 Varied

14(0.4)

7(0.5)

7(0.2)

 
  1. Note: Continuous variables are represented by mean (weighted standard deviation), categorical variables are represented by n (weighted %).There are 219 (6.7%) missing values in alcohol intake (drinks/day), 304 (9.4%) missing values in poverty income ratio, 25 (0.8%) missing values in BMI (kg/m2), 3 (0.09%) missing values in marital status, 2 (0.06%) missing values in smoking status, 6 (0.2%) missing values in educational attainment, 1 missing value (0.03%) in serum cotinine (ng/mL). Missing data on covariates were processed using the multiple imputation algorithm
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BMC Oral Health

ISSN: 1472-6831

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