OR for participation associated with demographic and socioeconomic variables, Brain Tumour case-control study 2000–2002, Sweden
| Glioma cases (n=494) | Meningioma cases (n=321) | Controls (n=955) | ||||
| Participants/non-participants no. (participation %) | OR (95% CI) | Participants/non-participants no. (participation %) | OR (95% CI) | Participants/non-participants no. (participation %) | OR (95% CI) | |
| Sex | ||||||
| Women | 146/51 (74) | Ref. | 196/37 (84) | Ref. | 357/148 (71) | Ref. |
| Men | 220/77 (74) | 1.0 (0.7 to 1.5) | 78/10 (89) | 1.5 (0.7 to 3.1) | 316/134 (70) | 1.0 (0.7 to 1.3) |
| Age at inclusion (years) | ||||||
| 20–29 | 25/6 (81) | Ref. | 6/2 (75) | Ref. | 49/22 (69) | Ref. |
| 30–39 | 47/14 (77) | 0.8 (0.3 to 2.4) | 16/5 (76) | 1.1 (0.2 to 7.1) | 82/45 (65) | 0.8 (0.4 to 1.5) |
| 40–49 | 70/16 (81) | 1.0 (0.4 to 3.0) | 50/6 (89) | 2.8 (0.5 to 17.0) | 126/47 (73) | 1.2 (0.7 to 2.2) |
| 50–59 | 117/44 (73) | 0.6 (0.2 to 1.7) | 116/14 (89) | 2.8 (0.5 to 15.0) | 223/87 (72) | 1.2 (0.7 to 2.0) |
| 60– | 107/47 (69) | 0.5 (0.2 to 1.4) | 86/20 (81) | 1.4 (0.3 to 7.6) | 193/81 (70) | 1.1 (0.6 to 1.9) |
| Unknown | 0/1 | |||||
| Marital status | ||||||
| Single | 78/29 (73) | Ref. | 43/6 (88) | Ref. | 140/79 (64) | Ref. |
| Married | 225/73 (76) | 1.1 (0.7 to 1.9) | 162/23 (88) | 1.0 (0.4 to 2.6) | 396/134 (75) | 1.7 (1.2 to 2.3) |
| Divorced | 50/20 (71) | 0.9 (0.5 to 1.8) | 57/13 (81) | 0.6 (0.2 to 1.7) | 110/52 (68) | 1.2 (0.8 to 1.8) |
| Widowed | 9/2 (82) | 1.7 (0.3 to 8.2) | 10/3 (77) | 0.5 (0.1 to 2.2) | 20/11 (65) | 1.0 (0.5 to 2.3) |
| Unknown | 4/4 | 2/2 | 7/6 | |||
| Education | ||||||
| Compulsory | 79/35 (69) | Ref. | 57/13 (81) | Ref. | 132/83 (61) | Ref. |
| Secondary school | ||||||
| ≤2 years | 97/36 (73) | 1.2 (0.7 to 2.1) | 85/15 (85) | 1.3 (0.6 to 2.9) | 216/91 (70) | 1.5 (1.0 to 2.2) |
| 3 years | 55/15 (79) | 1.6 (0.8 to 3.3) | 39/2 (95) | 4.4 (1.0 to 20.8) | 103/43 (71) | 1.5 (1.0 to 2.4) |
| Higher education | 129/38 (77) | 1.5 (0.9 to 2.6) | 91/15 (86) | 1.4 (0.6 to 3.1) | 212/52 (80) | 2.6 (1.7 to 3.9) |
| Unknown | 6/4 | 2/2 | 10/13 | |||
| Working status | ||||||
| Not working | 97/50 (66) | Ref. | 83/25 (77) | Ref. | 188/126 (60) | Ref. |
| Working | 265/74 (78) | 1.8 (1.2 to 2.8) | 189/20 (90) | 2.8 (1.5 to 5.4) | 478/150 (76) | 2.1 (1.6 to 2.9) |
| Unknown | 4/4 | 2/2 | 7/6 | |||
| Socioeconomic status* | ||||||
| Manual workers | 104/42 (71) | Ref. | 84/14 (86) | Ref. | 185/86 (68) | Ref. |
| Non-manual employees | 155/52 (75) | 1.2 (0.7 to 1.9) | 132/14 (90) | 1.6 (0.7 to 3.5) | 310/80 (79) | 1.8 (1.3 to 2.6) |
| Employees – not classified | 15/4 (79) | 1.5 (0.5 to 4.8) | 9/4 (69) | 0.4 (0.1 to 1.4) | 40/10 (80) | 1.9 (0.9 to 3.9) |
| Self-employed | 20/4 (83) | 2.0 (0.7 to 6.2) | 12/1 (92) | 2.0 (0.2 to 16.6) | 18/9 (67) | 0.9 (0.4 to 2.2) |
| Unknown | 72/26 | 37/14 | 120/97 | |||
| Income year 2000† | ||||||
| <110000 | 68/43 (61) | Ref. | 60/23 (72) | Ref. | 140/107 (57) | Ref. |
| 110000-150000 | 91/28 (76) | 2.1 (1.2 to 3.6) | 77/9 (90) | 3.3 (1.4 to 7.6) | 164/88 (65) | 1.4 (1.0 to 2.0) |
| >150000–190000 | 83/22 (79) | 2.4 (1.3 to 4.4) | 63/5 (93) | 4.8 (1.7 to 13.5) | 177/40 (82) | 3.4 (2.2 to 5.2) |
| >190000 | 120/31 (79) | 2.4 (1.4 to 4.2) | 72/8 (90) | 3.4 (1.4 to 8.3) | 185/41 (82) | 3.4 (2.3 to 5.3) |
| Unknown | 4/4 | 2/2 | 7/6 | |||