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. 2019 Jan 9;14(1):e0209942. doi: 10.1371/journal.pone.0209942

Table 2. Knowledge and perceptions related to HPV vaccination (n = 98).

% Mean (SD)
Recommendation of HPV vaccination to attendees of STD clinics in the last 12 months
Recommendation of HPV vaccination to any male STD clinic attendees
    No 83.7
    Yes 16.3
Recommendation of HPV vaccination to any female STD clinic attendees
    No 63.3
    Yes 36.7
Recommendation of HPV vaccination to any STD clinic attendees (either male or female)
    No 58.2
    Yes 41.8
Number of male STD clinic attendees they had recommended HPV vaccination to (among those who had recommended HPV vaccination to any male STD clinic attendees, n = 16)
    <5 75.0
    5–10 18.8
    >10 6.2
Number of female STD clinic attendees they had recommended HPV vaccination to (among those who had recommended HPV vaccination to any female STD clinic attendees, n = 36)
    <5 52.8
    5–10 25.0
    >10 22.2
Knowledge related to HPV vaccination
Is there a vaccine that protects against HPV for women
    Yes* 94.9
    No/not sure 5.1
Is there a vaccine that protects against HPV for men
    Yes* 76.5
    No/not sure 23.5
People who are sexually active cannot receive HPV vaccination
    Yes 1.0
    No* 99.0
People who have been diagnosed with HPV cannot be given HPV vaccination
    Yes 8.2
    No* 91.8
People with genital warts cannot be given HPV vaccination
    Yes 6.1
    No* 93.9
HIV-positive people cannot get HPV vaccination
    Yes 8.2
    No* 91.8
HPV vaccination is safe for pregnant women
    Yes 29.6
    No* 70.4
Number of correct responses to HPV-related knowledge 6.2 (0.9)
Perceptions related to recommending HPV vaccination to STD clinic attendees
Positive attitudes toward recommending HPV vaccination to STD clinic attendees (% agree/strongly agree)
HPV vaccination is highly effective in preventing HPV/HPV-related diseases among sexually active men and women 67.3
People who have already infected with one or more HPV types can still get protection from other HPV types in the vaccines 37.8
For people who are infected with HPV, HPV vaccination is effective in protecting them from having genital warts or related cancers 27.6
HPV vaccine is highly effective in preventing HPV/HPV-related diseases among HIV positive people 43.9
Positive Attitude Scale 1 12.9 (2.9)
Negative attitudes toward recommending HPV vaccination to STD clinic attendees (% agree/strongly agree)
Recommending HPV vaccines to patients will be regarded as hard selling an expensive vaccine 17.3
Time is not sufficient in each consultation session for recommending HPV vaccines to patients 63.3
It is difficult to initiate the conversation about HPV vaccines in the consultation 32.7
HPV vaccination is not related to the reasons of consultation 40.8
It is not my responsibility to recommend HPV vaccines to patients 26.5
There is lack of guideline or protocol for me to recommend HPV vaccines to patients 72.4
Recommendation of HPV vaccines will be given to patients only if vaccination is publicly funded 36.7
Negative Attitude Scale 2 21.6 (5.2)
Subjective norm related to recommending HPV vaccination to STD clinic attendees (% agree/strongly agree)
Your colleagues would support you to recommend HPV vaccination to attendees of your clinic 11.2
Your supervisors would support you to recommend HPV vaccination to attendees of your clinic 7.1
Subjective Norm Scale 3 5.0 (1.8)
Perceived behavioral control related to recommending HPV vaccination to STD clinic attendees (% agree/strongly agree)
You are confident that you can recommend HPV vaccination to attendees of your clinic even the consultation work is busy 29.6
You are confident that you can recommend HPV vaccination to attendees of your clinic if you have sufficient information about the vaccines 58.2
You are confident that you can recommend HPV vaccine to HPV vaccination to attendees of your clinic if there is guideline / protocol from the department 73.5
Perceived Behavioral Control Scale 4 10.4 (2.0)

STD: sexually transmitted diseases

* correct response to knowledge items

1 Positive Attitude Scale, 4 items, Cronbach alpha = 0.70

2 Negative Attitude Scale, 7 items, Cronbach alpha = 0.76

3 Subjective Norm Scale, 2 items, Cronbach alpha = 0.89

4 Perceived Behavioral Control Scale, 3 items, Cronbach alpha = 0.57