Table 1

Sociodemographic characteristics of the participants*

Variables*All n (%)Hannover city n (%)Isernhagen n (%)Lehrte n (%)Neustadt n (%)p Value†
Invited persons1050363214210263
Participation rate166 (15.8)67 (18.4)35 (16.3)36 (17.1)28 (10.6)
Median age (IQR)51.5 (43.3–61)51 (43–62)52 (43–61)49.5 (42.5–57)53 (46.3–61.8)0.70‡
Sex
 Male83 (50)38 (56.7)12 (34.2)20 (55.5)13 (46.5)0.18
 Female83 (50)29 (43.2)23 (65.7)16 (44.4)15 (53.5)
Country of birth
 Germany144 (86.7)55 (82)31 (88.5)32 (89)26 (92.8)0.26
 Other20 (12)12 (17.9)4 (11.4)2 (5.5)2 (7.1)
 Missing values2 (1.2)2 (5.5)
Education level
 Low60 (36.1)29 (43.2)13 (37.1)10 (27.7)8 (28.6)0.50
 Middle73 (43.9)25 (37.3)15 (42.8)18 (50)15 (53.6)
 Higher4 (2.4)1 (1.5)0 (0)1 (2.8)2 (7.1)
 Missing values29 (17.5)12 (17.9)7 (20)7 (19.4)3 (10.7)
  • *Data were obtained from the baseline questionnaire administered to the participants in Pretest 2 in all study centres.

  • †p Values for differences across the recruitment areas depicted in the table (χ2 test or Fisher's exact test).

  • ‡Kruskal-Wallis test.