Table 1 Predictors of fibromyalgia symptoms: multivariate analyses
From: Predictors of fibromyalgia: a population-based twin cohort study
OR (95 % CI) for LC2 1975 variable data | OR (95 % CI) for LC3 1975 variable data | n by variable in 1975 | OR (95 % CI) LC2 1981 variable data | OR (95 % CI) LC3 1981 variable data | n by variable in 1981 | |
|---|---|---|---|---|---|---|
age (years) | 1.02 (1.01–1.03) | 1.06 (1.05–1.07) | 8343 | 1.02 (1.01–1.03) | 1.06 (1.05–1.08) | 8343 |
gender (female/male) | 1.34 (1.20–1.50) | 1.41 (1.17–1.70) | 8343 | 1.08 (0.94–1.23) | 1.16 (0.89–1.49) | 8343 |
back pain (yes/no) | 1.56 (1.38–1.76) | 2.26 (1.88–2.72) | 8149 | 1.73 (1.47–2.04) | 2.99 (2.31–3.88) | 7281 |
shoulder pain (yes/no) | 1.42 (1.14–1.77) | 1.84 (1.36–2.49) | 8146 | 1.77 (1.41–2.21) | 1.75 (1.23–2.48) | 6636 |
neck pain (yes/no) | 1.94 (1.60–2.35) | 2.34 (1.79–3.07) | 8144 | 1.23 (0.98–1.54) | 1.76 (1.26–2.46) | 6718 |
poor sleep | 1.27 (0.96–1.66) | 1.78 (1.22–2.60) | 1.58 (1.17–2.14) | 2.34 (1.49–3.67) | ||
good sleep | 1.00 (reference category) | 1.00 | 8116 | 1.00 | 1.00 | 7966 |
BMI (kg/m-squared) | ||||||
≥ 30 | 1.19 (0.78–1.80) | 1.86 (1.09–3.17) | 1.19 (0.81–1.76) | 1.65 (0.91–3.01) | ||
25–29.9 | 1.20 (1.03–1.40) | 1.60 (1.28–1.99) | 1.32 (1.12–1.56) | 1.67 (1.27–2.20) | ||
18.5–24.9 | 1.00 (reference category) | 1.00 | 1.00 | 1.00 | ||
< 18.5 | 0.80 (0.64–1.00) | 0.86 (0.55–1.33) | 8056 | 0.62 (0.44–0.88) | 0.56 (0.25–1.25) | 7913 |
education (years) | 0.96 (0.94–0.97) | 0.86 (0.83–0.90) | 8134 | 0.97 (0.95–0.98) | 0.89 (0.85–0.92) | 7754 |
physical activity | ||||||
passive | 0.94 (0.83–1.07) | 1.15 (0.93–1.43) | 1.04 (0.90–1.21) | 1.08 (0.82–1.41) | ||
moderate | 1.00 (reference category) | 1.00 | 1.00 | 1.00 | ||
active | 0.90 (0.76–1.08) | 1.00 (0.73–1.38) | 8148 | 0.88 (0.72–1.08) | 0.87 (0.58–1.30) | 8007 |
exercise frequency/month | ||||||
1–2 times | 1.02 (0.90–1.16) | 0.98 (0.79–1.20) | 0.96 (0.82–1.13) | 0.94 (0.70–1.26) | ||
3–10 times | 1.00 (reference category) | 1.00 | 1.00 | 1.00 | ||
> 11 times | 0.856 (0.74–1.00) | 0.91 (0.69–1.18) | 7889 | 1.01 (0.85–1.20) | 1.01 (0.73–1.40) | 7849 |
smoking | ||||||
current | 1.10 (0.97–1.24) | 1.20 (0.98–1.47) | 1.11 (0.95–1.29) | 1.21 (0.91–1.59) | ||
former | 1.14 (0.98–1.32) | 0.97 (0.75–1.25) | 1.05 (0.90–1.24) | 0.95 (0.70–1.30) | ||
occasional | 1.27 (0.97–1.66) | 0.90 (0.53–1.52) | 1.12 (0.79–1.58) | 0.83 (0.40–1.72) | ||
never | 1.00 (reference category) | 1.00 | 8146 | 1.00 | 1.00 | 7936 |
migraine (yes/no) | n.a. | n.a. | 0.86 (0.68–1.08) | 1.17 (0.82–1.67) | 7986 | |
headache frequency | n.a. | n.a. | ||||
many /week | 3.35 (2.19–5.13) | 7.22 (4.03–12.95) | ||||
1–4 /month | 1.95 (1.62–2.35) | 2.22 (1.56–3.15) | ||||
some/year | 1.64 (1.40–1.93) | 1.64 (1.19–2.26) | ||||
never | 1.00 (ref. category) | 1.00 | 7767 | |||