Joseph T F Lau1, Jean H Kim, Xilin Yang, Hi Yi Tsui. 1. Centre for Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong. jlau@cuhk.edu.hk
Abstract
OBJECTIVES: The study investigated cross-sectional predictors of ever-undergone influenza vaccination (IV) and longitudinal predictors of first-time IV among Chinese elderly in Hong Kong. METHODS: A random telephone survey interviewed 886 Chinese respondents aged 65 and above and 483 of these 886 respondents (54.5%) completed another follow-up questionnaire. RESULTS: Of the 483 respondents, 25.1% (or 121) had ever undergone IV at baseline; 13% (47 of 362) were vaccinated for the first time during the follow-up period. The cross-sectional data identified 10 significant variables related to the Health Belief Model (HBM) predicting having ever undergone IV (e.g., perceived efficacy of prevention, side effects, financial difficulty, univariate OR=1.58-68.14 and 0.31-0.47). None of these variables could prospectively predict first-time IV during the follow-up period; the only significant variable was whether the respondent visited social centers during the follow-up period (OR=2.74). CONCLUSIONS: The 10 studied variables (e.g., perceived efficacy, perceived side effects) were predictive of whether ever undergone IV in the cross-sectional survey. These variables were, however, unable to predict first-time IV in the longitudinal study. Therefore, programs modifying these cross-sectional factors (e.g. change perceptions on efficacy and safety) may not be effective in promoting first-time IV among the elderly. Longitudinal intervention studies are warranted.
OBJECTIVES: The study investigated cross-sectional predictors of ever-undergone influenza vaccination (IV) and longitudinal predictors of first-time IV among Chinese elderly in Hong Kong. METHODS: A random telephone survey interviewed 886 Chinese respondents aged 65 and above and 483 of these 886 respondents (54.5%) completed another follow-up questionnaire. RESULTS: Of the 483 respondents, 25.1% (or 121) had ever undergone IV at baseline; 13% (47 of 362) were vaccinated for the first time during the follow-up period. The cross-sectional data identified 10 significant variables related to the Health Belief Model (HBM) predicting having ever undergone IV (e.g., perceived efficacy of prevention, side effects, financial difficulty, univariate OR=1.58-68.14 and 0.31-0.47). None of these variables could prospectively predict first-time IV during the follow-up period; the only significant variable was whether the respondent visited social centers during the follow-up period (OR=2.74). CONCLUSIONS: The 10 studied variables (e.g., perceived efficacy, perceived side effects) were predictive of whether ever undergone IV in the cross-sectional survey. These variables were, however, unable to predict first-time IV in the longitudinal study. Therefore, programs modifying these cross-sectional factors (e.g. change perceptions on efficacy and safety) may not be effective in promoting first-time IV among the elderly. Longitudinal intervention studies are warranted.
Authors: George N Okoli; Otto L T Lam; Florentin Racovitan; Viraj K Reddy; Christiaan H Righolt; Christine Neilson; Ayman Chit; Edward Thommes; Ahmed M Abou-Setta; Salaheddin M Mahmud Journal: PLoS One Date: 2020-06-18 Impact factor: 3.240
Authors: Bonnie C K Wong; Nelson Lee; Yuguo Li; Paul K S Chan; Hong Qiu; Zhiwen Luo; Raymond W M Lai; Karry L K Ngai; David S C Hui; K W Choi; Ignatius T S Yu Journal: Clin Infect Dis Date: 2010-10-13 Impact factor: 9.079