Table 2.

One-year prevalence rates with 95% confidence intervals of the soldiers at baseline in the present study and in an age-matched cohort, representative of the background population (18–22 year old male twins, surveyed in 1994).

Cohort	LBP	LLBP	leg pain
2,213 twins	43% (41–45%)	7% (6–9%)	5% (4–6%)
1,711 soldiers	42% (39–44%)	7% (6–9%)	5% (4–6%)