Canadian older adults’ perceptions of effectiveness and value of regular and high-dose influenza vaccines

Figures & data

Table 1. Characteristics of survey respondents (n = 5014).

Characteristic	n (%)
Age
Mean age (yrs); SD	71.34; 5.17
Median age	70
65 – 74 years	3803 (75.8)
≥ 75 years	1211 (24.2)
Gender
Man	2507 (50.0)
Woman	2505 (50.0)
Other (i.e. transgender)	2 (0.0)
Province
British Columbia	711 (14.2)
Alberta	435 (8.7)
Saskatchewan	144 (2.9)
Manitoba	166 (3.3)
Ontario	1914 (38.2)
Quebec	1258 (25.1)
New Brunswick	124 (2.5)
Nova Scotia	154 (3.1)
Prince Edward Island	23 (0.5)
Newfoundland and Labrador	85 (1.7)
Location
Village (< 1,000 people)	417 (8.3)
Town (1,000 to 99,999 people)	1749 (34.9)
City (> 100,000 people)	2848 (56.8)
Language
English	3600 (71.8)
French	1414 (28.2)
Chronic condition
None	2877 (57.4)
Diabetes	906 (18.1)
Heart disease	551 (11.0)
Asthma or chronic lung disease other than COPD	411 (8.2)
Blood disorders (not including high or low blood pressure)	326 (6.5)
COPD	260 (5.2)
Cancer	220 (4.4)
Neurological disorders	130 (2.6)
Kidney disease	122 (2.4)
Significant trouble with memory	83 (1.7)
Liver disease	36 (0.7)
HIV/AIDS	6 (0.1)

This table summarizes respondents’ demographics, medical history and frailty and function levels at the time of survey completion

Table 2. Changes in perceptions of need for new influenza vaccine*.

		Change in perception after reading PHAC statement
		I don’t know if a new vaccine is needed	I now think a more effective vaccine is needed	No change in my response	Other
Original response to question about whether a more effective vaccine is needed	I don’t know if a more effective vaccine is needed	265 (24.6)	311 (28.8)	465 (43.1)	38 (3.5)
	I don’t believe in flu vaccines	30 (6.2)	26 (5.4)	407 (84.3)	20 (4.1)
	Maybe a more effective vaccine is needed	47 (2.5)	552 (29.9)	1226 (66.4)	21 (1.1)
	No, the current vaccine is effective	46 (3.1)	175 (12.0)	1224 (83.6)	19 (1.3)
	Yes, a more effective vaccine is needed	4 (2.8)		135 (95.1)	3 (2.1)

*Dark grey shading indicates a change from the original response

Figure 1. Influenza vaccine preferences.

Figure 2. Influenza vaccine choice, by province (n = 5014).

Figure 3. Willingness to pay for HD vaccine, by province (n = 1426).

Figure 4. Willingness to pay for HD vaccine, by influenza/ILI status in the 2016/17 season.

Table 3. Association of patient factors with opinions, perceptions and behaviors.

	Typically receive influenza vaccine		Satisfied with current influenza vaccine		Perceive need for new influenza vaccine		Opt for HD vaccine if available for free		Opt for HD vaccine if available at a cost
	OR (95% CI)	P-value	OR (95% CI)	P-value	OR (95% CI)	P-value	OR (95% CI)	P-value	OR (95% CI)	P-value
Age	1.42 (1.13, 1.79)	0.003	1.63 (1.40, 1.90)	<0.001	0.90 (0.79, 1.03)	0.13	0.80 [0.69, 0.92)	0.002	0.96 (0.83, 1.12)	0.62
Female	0.84 (0.69, 1.01)	0.07	0.80 (0.71, 0.91)	0.00046	0.89 (0.80, 1.00)	0.06	0.83 (0.74, 0.94)	0.004	0.72 (0.64, 0.83)	<0.001
Location Town City	1.13 (0.79, 1.60) 1.23 (0.88, 1.73)	0.51 0.23	1.07 (0.85, 1.34) 1.32 (1.06, 1.64)	0.57 0.012	0.96 (0.77, 1.19) 1.07 (0.86, 1.32)	0.69 0.56	0.75 (0.59, 1.95) 0.89 (0.71, 1.12)	0.02 0.33	0.84 (0.65, 1.08) 0.92 (0.72, 1.18)	0.16 0.50
Chronic disease	1.68 (1.38, 2.04)	<0.001	1.49 (1.31, 1.69)	˂0.001	0.93 (0.83, 1.05)	0.24	1.09 (0.96, 1.23)	0.18	1.01 (0.89, 1.15)	0.85
Influenza/ILI in 2016/17 season	N/A	N/A	0.78 (0.67, 0.90)	˂0.001	1.82 (1.57, 2.12)	<0.001	1.26 (1.09, 1.47)	0.002	1.23 (1.05, 1.43)	0.01
Typically receive influenza vaccine	N/A	N/A			1.18 (1.03, 1.34)	0.015	3.48 (2.78, 4.39)	<0.001	3.50 (2.71, 4.56)	<0.001
Satisfied with current vaccine	60.49 (49.87, 73.80)	<0.001	N/A	N/A	N/A	N/A	2.35 (1.92, 2.88)	<0.001	2.00 (1.60, 2.50)	<0.001
Perceive need for new vaccine	N/A	N/A	N/A	N/A	N/A	N/A	1.84 (1.62, 2.10)	<0.001	1.62 (1.41, 1.85)	<0.001