A longitudinal study on determinants of HPV vaccination uptake in parents/guardians from different ethnic backgrounds in Amsterdam, the Netherlands

Table 4 HPV vaccination intention: multivariable linear regression analyses of socio-demographic, social-psychological and other factors. HPV vaccination acceptability study among parents/guardians, in Amsterdam, the Netherlands, 2014

	Multivariable^a
	NL		SNA		MENA		Other
	(n = 723)		(n = 126)		(n = 237)		(n = 223)
	ß	95% CI	ß	95% CI	ß	95% CI	ß	95% CI
step 1
Attitude	0.66	(0.57,0.75)	0.70	(0.48,0.91)	1.03	(0.88,1.17)	0.71	(0.55,0.86)
Beliefs	0.36	(0.24,0.49)	0.28	(0.04,0.52)			0.27	(0.07,0.46)
Risk perception when not vaccinating					0.11	(0.01,0.21)
Relative effectiveness	0.11	(0, 0.22)
Subjective norms	0.49	(0.35,0.63)			0.27	(0.08,0.46)
Descriptive norms			0.13	(0.01,0.25)	0.12	(0.02,0.23)	0.14	(0.05,0.23)
step 2
Ambivalence towards the decision	−0.08	(−0.13,−0.03)
Information processing	−0.10	(−0.15,−0.04)
Evaluation of the HPV information	0.23	(0.12,0.34)	0.43	(0.21,0.66)			0.25	(0.06,0.44)
Past experience with vaccinating older daughter against HPV
Older daughter not	REF						REF
Older daughter partially/fully vaccinated	0.92	(0.65,1.19)					0.94	(0.33,1.54)
No older daughter	0.79	(0.53,1.05)					0.81	(0.21,1.40)
Past experience of someone close or him/herself with (prestage of) cervical cancer
No							REF
Yes							0.20	(0.04,0.36)
Education
Low	REF
Intermediate	0.14	(0.03,0.25)
High	0.13	(0.01,0.24)
Religion
No religion	REF
Religious	−0.20	(−0.30,−0.10)
Multivariable model	R²		R²		R²		R²
Step 1	0.73		0.61		0.75		0.63
Step 1 + 2	0.77		0.66				0.66

^aThe multivariable analyses was executed by adding variables in two step: (step 1) proximal determinants, and (step 2) distal determinants. During each step backward selection was applied to reduce the number of determinants. Please note, that when executing a stepwise multivariable analyses, variables significant (p < 0.05) in one step may not be significant when variables are added during subsequent steps
Abbrevations: R ² R squared, is a number that indicates how well the data fit a linear regression model
NL denotes participants with a Dutch ethnicity, SNA denotes participants with a Surinamese, Netherlands Antillean or Aruban ethnicity, MENA denotes participants with a Middle Eastern or North African ethnicity (including Turkish participants), Other denotes participants from all other ethnicities
Interpretation of the coefficient of continuous determinants: if a determinant increases with one unit we expect to see an increase in intention with the coefficient specified for that determinant. For example, among the Dutch, if attitude increases with one unit, we expect intention to increase with 0.66
Interpretation of the coefficient of categorical determinants: the intention to be vaccinated is ß higher or lower in the non-reference category when compared to the reference category. For example, overall, Dutch participants that are highly educated have an intention that is 0.13 higher (on the scale of −2 to +2) when compared to those participants with a low education

ISSN: 1471-2458