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Table 6 The final models for outcome measures during service, combining social and physical factors (odds ratios with 95% confidence intervals). Statistically significant findings are indicated with bold typing.

From: Low back pain in military recruits in relation to social background and previous low back pain. A cross-sectional and prospective observational survey

N = 982 LBP n = 345 LLBP n = 56 Leg pain n = 66 Exemption1 n = 65
IQ-score low 1.00 - 1.00 1.00
IQ-score medium 1.14 (0.73–1.79) - 0.75 (0.35–1.61) 0.56 (0.25–1.25)
IQ-score high 1.00 (0.61–1.63) - 0.24 (0.08–0.74)** 0.24 (0.08–0.76)*
Parents grade school 1.00 - 1.00 1.00
Parents high school 1.56 (1.01–2.42)* - 1.05 (0.48–2.27) 1.14 (0.48–2.71)
Parents >12 years education 1.90 (1.21–2.99)** - 1.06 (0.47–2.38) 1.40 (0.59–3.35)
Sedentary occupation - - 0.87 (0.42–1.79) -
Years of school - - - 0.91 (0.72–1.14)
Baseline Leg pain - - 3.14 (1.13–9.85)* -
0 days with LBP previous year 1.00 1.00 1.00 1.00
1–7 days with LBP previous year 2.31 (1.49–3.59)** 1.11 (0.44–2.84) 0.79 (0.28–2.22) 2.33 (0.94–5.79)
8–30 days with LBP previous year 6.09 (3.78–9.84)** 2.47 (1.14–5.32)* 2.52 (1.28–6.20)** 1.78 (0.64–4.94)
>30 days with LBP previous year 6.18 (3.42–11.17)** 4.80 (2.13–10.84)** 3.28 (1.31–8.25)** 5.93 (2.37–14.83)**
  1. *: p < 0.05, **:p < 0.01