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. 2019 Aug 27;9(8):e026245. doi: 10.1136/bmjopen-2018-026245

Table 1.

Baseline characteristics of the total sample and by smoking status (unweighted data)*

Total sample
(n=2062; 100%)
Current smoker
(n=586; 28.4%)
Ex-smoker
(n=369; 17.9%)
Never-smoker
(n=1107; 53.7%)
Age, years (mean±SD) 51.8±19.8 47.1±17.2 58.4±17.5 52.1±21.1
Sex
 Female 1070 (51.9%) 271 (46.2%) 143 (38.8%) 656 (59.3%)
 Male 992 (48.1%) 315 (53.8%) 226 (61.2%) 451 (40.7%)
Education†
 High school equiv. 479 (23.2%) 110 (19.2%) 85 (23.2%) 284 (27.4%)
 Adv. tech. college equiv. 133 (6.5%) 28 (4.9%) 30 (8.2%) 75 (7.2%)
 Secondary school equiv. 686 (33.3%) 230 (40.1%) 116 (31.7%) 340 (32.8%)
 Junior high school equiv. 646 (31.3%) 193 (33.6%) 130 (35.5%) 323 (31.1%)
 No qualification 33 (1.6%) 13 (2.3%) 5 (1.4%) 15 (1.4.5%)
Household income
 >€5000/per month 134 (6.5%) 26 (4.4%) 27 (7.3%) 81 (7.3%)
 €4000–5000/per month 128 (6.2%) 31 (5.3%) 24 (6.5%) 73 (6.6%)
 €3000–4000/per month 369 (17.9%) 96 (16.4%) 67 (18.2%) 206 (18.6%)
 €2000–3000/per month 557 (27.0%) 164 (28.0%) 106 (28.7%) 287 (25.9%)
 €1000–2000/per month 638 (30.9%) 173 (29.5%) 117 (31.7%) 348 (31.4%)
 < €1,000/per month 236 (11.4%) 96 (16.4%) 28 (7.6%) 112 (10.1%)

*Baseline characteristics of the sample have also been published elsewhere18 under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited: CC BY 4.0. Data are presented as number (% within row), unless otherwise stated.

†German equivalents to education levels listed in table from highest to lowest: high school equivalent = “Allgemeine Hochschulreife,” advanced technical college equivalent = “Fachhochschulreife,” secondary school equivalent = “Realschulabschluss,” junior high school equivalent = “Hauptschulabschluss”.