Table 2.
Item responses of knowledge and perceptions related to pneumococcal vaccination (PV) (n = 750)
| % | Mean (SD) | |
|---|---|---|
| Knowledge related to pneumococcal diseases and PV | ||
| Whether diseases caused by Streptococcus pneumoniae have more severe consequences among elderly individuals | ||
| No | 1.7 | |
| Yes* | 59.9 | |
| Uncertain | 38.4 | |
| Whether healthy people can carry Streptococcus pneumoniae | ||
| No | 9.0 | |
| Yes* | 22.5 | |
| Uncertain | 68.5 | |
| Whether Streptococcus pneumoniae can be transmitted distantly in the air (e.g., from one building to another) | ||
| No* | 10.4 | |
| Yes | 7.5 | |
| Uncertain | 82.1 | |
| Whether pneumococcal pneumonia can be cured by antibiotics | ||
| No | 7.4 | |
| Yes* | 12.7 | |
| Uncertain | 79.9 | |
| Whether influenza infection would increase the risk of pneumococcal pneumonia | ||
| No | 1.6 | |
| Yes* | 46.7 | |
| Uncertain | 51.7 | |
| Whether Hong Kong SAR government recommends elderly individuals aged ≥65 y to take up PV | ||
| No | 8.3 | |
| Yes* | 58.5 | |
| Uncertain | 33.2 | |
| Whether public hospitals/clinics provides free PV to elderly individuals aged ≥65 y | ||
| No | 3.3 | |
| Yes* | 38.0 | |
| Uncertain | 58.7 | |
| Number of correct responses to knowledge items related to pneumonia and PV | ||
| 1–2 | 36.5 | |
| 3–5 | 53.1 | |
| 6–7 | 10.4 | |
| Perceptions related to pneumococcal diseases and PV | ||
| Perceived susceptibility to pneumococcal diseases without taking up PV (% high/very high) | ||
| Chance of having pneumonia | 28.8 | |
| Chance of having severe invasive pneumococcal diseases (e.g., septicemia or meningitis) | 26.7 | |
| Perceived Susceptibility Scale | 6.4 (1.3) | |
| Perceived benefit of PV for oneself (% agree) | ||
| PV is highly effective in preventing you from pneumonia | 43.5 | |
| PV is highly effective in preventing you from severe invasive pneumococcal diseases (e.g., septicemia or meningitis) | 14.3 | |
| You will feel at ease after taking up PV | 52.4 | |
| Perceived Benefit for Oneself Scale | 6.8 (1.5) | |
| Perceived benefit of PV for others (% agree) | ||
| Taking up PV is highly effective in preventing pneumonia transmission in Hong Kong | 34.4 | |
| Taking up PV is highly effective in protecting your family members against pneumonia | 35.1 | |
| Perceived Benefit for Others Scale | ||
| Perceived barrier of taking up PV (% agree) | ||
| PV is expensive for you | 16.1 | |
| You concerned about side-effects of PV | 18.9 | |
| The time and venue of PV is inconvenient for you | 8.4 | |
| Perceived Barrier Scale | 5.1 (1.6) | |
| Perceived cue to action related to PV | ||
| Your significant others suggest you to take up PV | ||
| Disagree/neutral | 56.0 | |
| Agree | 44.0 | |
| Perceived self-efficacy related to PV | ||
| You are confident to take up PV if you want | ||
| Disagree/neutral | 39.1 | |
| Agree | 60.9 | |
| Peer influence related to PV | ||
| Number of peers of similar age who have taken up PV | ||
| 0 | 39.2 | |
| 1–2 | 12.8 | |
| 3–5 | 4.8 | |
| >5 | 1.6 | |
| Uncertain | 41.6 | |
| Having peers of similar age who have taken up PV and had severe side-effects (among those who had at least one peer who had taken up PV, n = 144) | ||
| No | 95.1 | |
| Yes | 4.9 | |
| Having peers of similar age who were infected with pneumonia after receiving PV (among those who had at least one peer who had taken up PV, n = 144) | ||
| No | 99.3 | |
| Yes | 0.7 | |
| Social media influence related to PV | ||
| Exposure to the information supporting PV on social media (% seldom/sometimes/always) | ||
| Elderly people shared their experience to support PV | 33.3 | |
| Friends or family suggested you to receive PV through social media | 30.0 | |
| Report about elderly individuals had severe conditions or died of pneumonia (R) | 40.0 | |
| Commentary or introduction about PV services provided by government for elderly people | 28.6 | |
| Social Media Influence Scale | 4.1 (0.5) |
*Correct response.
R: reverse scoring.