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Table 2 Risk of testing PCR positive for multiple HPV types at each visit given vaginal pH measurement, stratified by age at visit

From: A large, population-based study of age-related associations between vaginal pH and human papillomavirus infection

Vaginal pH Level

N

Percent with Multiple HPV Types

Odds of Testing PCR Positive for Multiple HPV Typesa (95% CI)

p-value

All Womenb

    

4.0-4.5

4,118

35.1

ref

< 0.01

5.0-5.5

2,165

39.4

1.4 (1.1-1.4)

 

Age at Visit

    

< 25 years

    

4.0-4.5

535

46.2

ref

0.01

5.0-5.5

187

56.7

1.5 (1.1-2.1)

 

25-34 years

    

4.0-4.5

1,501

34.6

ref

0.01

5.0-5.5

483

41.2

1.3 (1.1-1.6)

 

35-44 years

    

4.0-4.5

1,053

30.4

ref

0.42

5.0-5.5

307

32.9

1.1 (0.8-1.5)

 

45-54 years

    

4.0-4.5

492

32.1

ref

0.48

5.0-5.5

314

29.6

0.9 (0.6-1.2)

 

55-64 years

    

4.0-4.5

297

38.7

ref

0.16

5.0-5.5

365

32.9

0.8 (0.5-1.1)

 

65+ years

    

4.0-4.5

240

35.0

ref

< 0.01

5.0-5.5

509

46.0

1.6 (1.1-2.2)

 
  1. a Generalized estimating equation models with an independent correlation structure were used to estimate the odds of testing positive for multiple HPV given dichotomous pH measurements at each visit
  2. b Adjusted for age at visit