Table 1 Characteristics of the study populationa
Characteristic | Category | Abstinent at primary endpoint (n = 11) | Current smoker at primary endpoint (n = 15) | Stopped participation or lost-to-follow-up (n = 13) |
|---|---|---|---|---|
Age | Median (IQR) | 35 (27–38) | 31 (29–38) | 30 (27–32) |
Country of birth | The Netherlands | 10 (91) | 14 (93) | 10 (77) |
Netherlands Antilles | 0 (0) | 0 (0) | 1 (8) | |
Germany | 0 (0) | 1 (7) | 1 (8) | |
Iraq | 0 (0) | 0 (0) | 1 (8) | |
United States | 1 (9) | 0 (0) | 0 (0) | |
Marital status | Married or registered partnership | 2 (18) | 3 (20) | 1 (8) |
Living together | 5 (46) | 7 (47) | 4 (31) | |
Committed relationship, not living together | 2 (18) | 5 (33) | 6 (46) | |
Single | 2 (18) | 0 (0) | 2 (15) | |
Living situation | Rental home | 9 (82) | 10 (67) | 7 (54) |
House owner | 2 (18) | 2 (13) | 3 (23) | |
Living with parents/family/friends | 0 (0) | 3 (20) | 1 (8) | |
Assisted living | 0 (0) | 0 (0) | 1 (8) | |
No permanent residence | 0 (0) | 0 (0) | 1 (8) | |
Education levelb | Low (special education, elementary school, high school) | 1 (9) | 2 (13) | 6 (46) |
Middle (Secondary vocational education) | 5 (46) | 12 (80) | 6 (46) | |
High (University of applied sciences, university) | 5 (46) | 1 (7) | 1 (8) | |
Employment | Yes, fulltime | 4 (36) | 3 (20) | 3 (23) |
Yes, part-time | 3 (27) | 2 (13) | 3 (23) | |
Unemployed | 4 (36) | 9 (60) | 7 (54) | |
Missing | 0 (0) | 1 (7) | 0 (0) | |
Net family income |  < 1000 euro/month | 0 (0) | 2 (13) | 2 (15) |
1000–1499 euro/month | 2 (18) | 2 (13) | 4 (31) | |
1500–1999 euro/month | 0 (0) | 4 (27) | 2 (15) | |
2000–2499 euro/month | 2 (18) | 2 (13) | 2 (15) | |
2500–2999 euro/month | 2 (18) | 4 (27) | 1 (8) | |
 > 3000 euro/month | 5 (46) | 1 (7) | 2 (15) | |
Self-reported financial problems | Yes | 3 (27) | 4 (27) | 7 (54) |
No | 8 (73) | 11 (73) | 6 (46) | |
Self-reported relational problems (partner or family) | Yes | 7 (64) | 0 (0) | 2 (15) |
No | 4 (36) | 15 (100) | 11 (85) | |
Drug use | No | 9 (82) | 12 (80) | 12 (92) |
Former | 1 (9) | 3 (20) | 1 (8) | |
Yes, marihuana | 1 (9) | 0 (0) | 0 (0) | |
Alcohol consumption | Never | 3 (27) | 4 (27) | 2 (15) |
Quit because of pregnancy | 5 (46) | 5 (33) | 7 (54) | |
Quit because of other reason than pregnancy | 2 (18) | 5 (33) | 2 (15) | |
Yes | 1 (9) | 1 (7) | 2 (15) | |
BMI | Underweight (BMI < 18.5) | 1 (9) | 0 (0) | 0 (0) |
Normal (BMI 18.5–25) | 4 (36) | 3 (20) | 5 (39) | |
Overweight (BMI 25–30) | 2 (18) | 6 (40) | 5 (39) | |
Moderately obese (BMI 30–35) | 3 (27) | 4 (27) | 2 (15) | |
Severely obese (BMI 35–40) | 1 (9) | 0 (0) | 1 (8) | |
Very severely obese BMI > 40) | 0 (0) | 2 (13) | 0 (0) |