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Table 1 Baseline characteristics of participants (N = 1954)

From: Negative associations between folate and bacterial vaginosis in the NHANES 2001 to 2004

Characteristic

Bacterial vaginosis(BV)

 

Negative(Nugent-BV ≤ 6)

Positive(Nugent-BV ≥ 7)

P-value

N

1088

866

 

Age (year), Mean ± SD

29.37 ± 10.23

29.52 ± 10.58

0.755

BMI (kg/m^2)a, Mean ± SD

27.18 ± 6.88

28.75 ± 7.69

< 0.001

Folate, serum (ng/ml), Median (Min–Max)

11.80 (2.00–689.00)

10.10 (2.10–61.40)

0.003

Folate, rbc (ng/ml rbc), Mean ± SD

282.06 ± 126.96

247.98 ± 99.34

< 0.001

Uric acid (mg/dl), Mean ± SD

4.29 ± 0.98

4.49 ± 1.11

< 0.001

Vitamin b12, serum (pg/ml), Median (Min–Max)

437.00 (106.00–4031.00)

467.00 (87.00–34,197.00)

0.005

Total cholesterol (mg/dl), Mean ± SD

189.02 ± 39.37

187.59 ± 43.38

0.215

Hdl-cholesterol (mg/dl), Mean ± SD

57.78 ± 15.35

55.36 ± 15.73

< 0.001

Calcium (mg), Median (Min–Max)

0.00 (0.00–8400.00)

0.00 (0.00–8000.00)

< 0.001

Race

  

< 0.001

 Mexican American

262 (24.08%)

241 (27.83%)

 

 Other Hispanic

39 (3.58%)

39 (4.50%)

 

 Non-Hispanic White

544 (50.00%)

240 (27.71%)

 

 Non-Hispanic Black

202 (18.57%)

314 (36.26%)

 

 Other Race—Including Multi-Racial

41 (3.77%)

32 (3.70%)

 

Education level

  

< 0.001

 < High school

372 (34.19%)

358 (41.34%)

 

 High school

216 (19.85%)

198 (22.86%)

 

 > High school

500 (45.96%)

310 (35.80%)

 

Marital

  

< 0.001

 Married

493 (45.31%)

272 (31.41%)

 

 Widowed

9 (0.83%)

9 (1.04%)

 

 Divorced

56 (5.15%)

67 (7.74%)

 

 Separated

21 (1.93%)

46 (5.31%)

 

 Never married

442 (40.62%)

394 (45.50%)

 

 Living with partner

67 (6.16%)

78 (9.01%)

 

Physical activity

  

< 0.001

 No

183 (16.82%)

207 (23.90%)

 

 Both

305 (28.03%)

259 (29.91%)

 

 Moderate

226 (20.77%)

159 (18.36%)

 

 Vigorous

374 (34.38%)

241 (27.83%)

 
  1. aBMI was calculated as the body weight in kilograms divided by the square of the height in meters
  2. P value: if it is a continuous variable, it is obtained by Kruskal Wallis rank sum test. If the theoretical number of counting variables is less than 10, it is obtained by Fisher exact probability test