Table 2.

Results of logistic regression model: dependent variable: regular vaccination: 0 = No, 1 = Yes; odds ratios (95% confidence intervals) are displayed

Independent variables	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
Psychological factor included in regression model:	Life satisfaction, (Pavot/Diener 1993) [33]	Positive affect (Watson, Clark & Tellegen 1988) [37]	Negative affect (Watson, Clark & Tellegen 1988) [37]	Optimism (Brandstädter/Wentura 1994) [28]	Self-efficacy (Schwarzer/Jerusalem 1995) [30]	Self-esteem (Rosenberg 1965) [32]	Self-regulation (Freund/Baltes 2002) [36]	Perceived stress (Cohen et al. 1983) [31]
Gender: Femalea	1.030	1.020	1.010	1.026	1.027	1.034	1.033	1.003
	(0.896 – 1.183)	(0.888 – 1.172)	(0.879 – 1.161)	(0.893 – 1.177)	(0.895 – 1.179)	(0.901 – 1.187)	(0.899 – 1.188)	(0.873 – 1.152)
Age in years	1.063***	1.063***	1.064***	1.061***	1.062***	1.062***	1.063***	1.062***
	(1.053 – 1.074)	(1.052 – 1.073)	(1.053 – 1.074)	(1.051 – 1.072)	(1.052 – 1.072)	(1.052 – 1.072)	(1.053 – 1.074)	(1.052 – 1.072)
Marital status: Not marriedb	0.797**	0.803**	0.805**	0.794**	0.800**	0.799**	0.801**	0.812**
	(0.690 – 0.920)	(0.696 – 0.927)	(0.698 – 0.929)	(0.689 – 0.916)	(0.694 – 0.922)	(0.693 – 0.921)	(0.693 – 0.925)	(0.703 – 0.936)
Monthly net equivalence income	1.000	1.000	1.000	1.000	1.000	1.000	1.000	1.000
	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)	(1.000 – 1.000)
Region: East	2.776***	2.756***	2.783***	2.770***	2.780***	2.783***	2.724***	2.812***
	(2.418 – 3.188)	(2.401 – 3.165)	(2.423 – 3.198)	(2.414 – 3.179)	(2.422 – 3.191)	(2.425 – 3.194)	(2.370 – 3.131)	(2.447 – 3.231)
Body-Mass-Index (BMI)	1.021**	1.020**	1.021**	1.021**	1.020**	1.020**	1.020*	1.019*
	(1.005 – 1.036)	(1.005 – 1.036)	(1.006 – 1.037)	(1.005 – 1.036)	(1.005 – 1.036)	(1.005 – 1.036)	(1.005 – 1.035)	(1.004 – 1.035)
Smoking status: Yes, sometimesc	1.040	1.040	1.042	1.033	1.038	0.998	1.087	1.026
	(0.682 – 1.588)	(0.682 – 1.588)	(0.683 – 1.590)	(0.678 – 1.576)	(0.681 – 1.584)	(0.655 – 1.518)	(0.710 – 1.664)	(0.673 – 1.565)
- Not anymorec	1.139	1.134	1.132	1.130	1.132	1.141	1.124	1.195
	(0.897 – 1.445)	(0.893 – 1.439)	(0.892 – 1.438)	(0.891 – 1.433)	(0.893 – 1.435)	(0.900 – 1.447)	(0.884 – 1.430)	(0.941 – 1.518)
- Never been smokerc	1.075	1.071	1.069	1.070	1.073	1.081	1.065	1.127
	(0.847 – 1.364)	(0.844 – 1.358)	(0.843 – 1.356)	(0.844 – 1.356)	(0.847 – 1.359)	(0.853 – 1.369)	(0.838 – 1.354)	(0.888 – 1.431)
Consumption of alcohol: several times a weekd	1.380**	1.374**	1.376**	1.363**	1.359**	1.369**	1.390**	1.362**
	(1.119 – 1.701)	(1.114 – 1.694)	(1.116 – 1.698)	(1.106 – 1.681)	(1.103 – 1.675)	(1.110 – 1.687)	(1.125 – 1.716)	(1.103 – 1.681)
- Once a weekd	1.361*	1.358*	1.360*	1.361*	1.360*	1.369**	1.379**	1.344*
	(1.074 – 1.723)	(1.072 – 1.721)	(1.073 – 1.723)	(1.075 – 1.722)	(1.075 – 1.721)	(1.082 – 1.733)	(1.088 – 1.749)	(1.060 – 1.703)
- One to three times a month4	1.359*	1.368*	1.366*	1.356*	1.358*	1.346*	1.353*	1.352*
	(1.055 – 1.750)	(1.062 – 1.762)	(1.060 – 1.760)	(1.053 – 1.745)	(1.054 – 1.748)	(1.046 – 1.733)	(1.049 – 1.745)	(1.049 – 1.743)
- Less frequentlyd	1.569***	1.566***	1.572***	1.554***	1.573***	1.545***	1.556***	1.500***
	(1.262 – 1.952)	(1.259 – 1.949)	(1.264 – 1.957)	(1.250 – 1.932)	(1.265 – 1.955)	(1.243 – 1.920)	(1.249 – 1.938)	(1.205 – 1.868)
- Neverd	1.479**	1.491**	1.491**	1.484**	1.488**	1.490**	1.576***	1.495**
	(1.149 – 1.903)	(1.159 – 1.918)	(1.159 – 1.918)	(1.154 – 1.907)	(1.158 – 1.912)	(1.159 – 1.914)	(1.222 – 2.034)	(1.160 – 1.926)
Number of physical illnesses	1.116***	1.120***	1.111***	1.113***	1.118***	1.111***	1.121***	1.106***
	(1.076 – 1.157)	(1.081 – 1.161)	(1.071 – 1.153)	(1.074 – 1.154)	(1.078 – 1.159)	(1.072 – 1.152)	(1.081 – 1.162)	(1.067 – 1.147)
Psychological factor	0.948	1.014	1.114	0.895+	0.893	0.841*	1.098	1.160**
	(0.863 – 1.042)	(0.895 – 1.149)	(0.975 – 1.272)	(0.794 – 1.008)	(0.771 – 1.035)	(0.712 – 0.994)	(0.971 – 1.241)	(1.048 – 1.285)
Constant	0.00394***	0.00320***	0.00251***	0.00512***	0.00501***	0.00636***	0.00226***	0.00254***
	(0.00161 – 0.00966)	(0.00118 – 0.00867)	(0.000986 – 0.00641)	(0.00201 – 0.0131)	(0.00190 – 0.0132)	(0.00227 – 0.0178)	(0.000847 – 0.00602)	(0.00104 – 0.00617)
Observations	4525	4522	4521	4557	4553	4567	4477	4500
Pseudo R2	0.0898	0.0894	0.0898	0.0900	0.0905	0.0899	0.0902	0.0909

Reference category: ^amale ^bmarried ^cdaily smoker ^ddaily; ^*** p < .001, ^** p < .01, ^* p < .05; ⁺ p < .10; The number of physical illnesses ranged from 0 to 11; Life satisfaction was quantified using the Satisfaction with Life Scale (ranging from 1 to 5, with higher values corresponding to more satisfaction); Positive and negative affect was quantified using the Positive and Negative Affect Schedule (both ranging from 1 to 5, with higher values corresponding to higher positive and negative affect, respectively); Optimism was quantified using a scale developed by Brandtstädter and Wentura (ranging from 1 to 4, with higher values corresponding to higher optimism); Self-efficacy was quantified using a scale developed by Schwarzer and Jerusalem (ranging from 1 to 4, with higher values corresponding to higher self-efficacy); Self-esteem was quantified using the Rosenberg scale (ranging from 1 to 4, with higher values corresponding to higher self-esteem); Self-regulation was quantified using a scale developed by Ziegelmann and Lippke (ranging from 1 to 4, with higher values corresponding to higher self-regulation); Perceived stress was using a scale developed by Cohen and colleagues (ranging from 1 to 5, with higher values corresponding to higher perceived stress)