Table 1. General characteristics of questionnaire about influenza vaccination and nurses’ responses.

Characteristic

Date of survey

2006 Sep–Oct	2007 Oct–Nov	2009 July–Aug	2011 Mar–Apr	2012 Feb–Mar
General
No. questionnaires delivered	2,825	2,929	2,929	2,494	2,492
Response rate, %	38.2	26.9	27.7	28.4	26.6
Total no. respondents	903	739	779	477	651
Male, %	11.7	14.1	14.2	17.6	15.1
Reasons for getting vaccinated, no. respondents*	510	339	306	127	161
Self-protection, %	74	88	87	94	91
Protecting others, %	32	58	53	71	67
Work requirement, %	38	55	62	39	33
Reasons for not getting vaccinated,* no. respondents	377	397	451	350	490
Concern about side effects, %	42	55	62	70	56
Ineffectiveness for self-protection, %	50	57*	51	45	50
Ineffectiveness for protecting others, %	9	22	14	13	23
Lack of work requirement, %	7	9	6	6	5

*A multiple-choice list was provided for respondents. Only common reasons specifically chosen by respondents in each survey are included in the table, in order of their preferences. Less than 5% chose “other” as their reason for getting vaccinated, whereas ≈20% chose “other” as their reason for not getting vaccinated.