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Table 4 Frequency table showing the associations between the explanatory variables and the four outcome variables for 412 40-yr old Danes (percent and 95% confidence intervals). Estimates with non-overlapping confidence intervals were considered to be significantly different from each other.
| Independent variables | LBPyear | LBPlong | DD | VIP |
|---|---|---|---|---|
| Smoking | ||||
| None | 64 (56–71) | 27 (20–33) | 51 (44–59) | 15 (10–21) |
| 1–19 cig/day | 72 (65–79) | 20 (14–26) | 50 (42–57) | 16 (11–22) |
| ≥20 cig/day | 73 (62–83) | 33 (22–44) | 57 (45–69) | 26 (15–36) |
| BMI | ||||
| Underweight | 50 (26–74) | 15 (-2 -32) | 40 (16–63) | 10 (-4-24) |
| Normal weight | 69 (62–75) | 25 (19–31) | 49 (42–55) | 18 (13–23) |
| Overweight | 70 (62–79) | 28 (19–36) | 59(50–68) | 20 (13–27) |
| Heavy overweight | 72 (60–83) | 22 (11–32) | 55 (42–68) | 17 (7–26) |
| Work | ||||
| Sitting | 67 (57–77) | 20 (12–29) | 43 (34–55) | 11 (4–18)* |
| S itting/walking | 67 (59–74) | 22 (15–29) | 58 (49–66) | 19 (13–26) |
| Light physical | 68 (59–78) | 30 (21–40) | 46 (35–56) | 10 (3–16) |
| Hard physical | 75 (54–84) | 26 (17–36) | 58 (48–69) | 31 (21–41)* |
