Table 3.

Back pain in the last month and possible risk factors for the total sample and by sex.

BP Last Month	Total (N = 513, N with BP = 180)		Male (N = 257, N with BP = 81)		Female (N = 256, N with BP = 99)
	OR (95% CI)	p	OR (95% CI)	p	OR (95% CI)	p
Sex	1.61(1.01–2.55)	0.05	-	-	-	-
Age	1.29 (1.15–1.45)	< 0.001	1.19 (0.99–1.42)	0.06	1.39 (1.19–1.63)	< 0.001
Maturity status
Pre-PHV	0.49 (0.30–0.81)	0.005	0.90 (0.44–1.80)	0.75	0.31 (0.14–0.66)	0.003
Circa-PHV	0.75 (0.44–1.29)	0.30	0.83 (0.34–1.99)	0.67	0.64 (0.32–1.29)	0.21
Post-PHV	3.38 (2.03–5.60)	<0.001	2.43 (0.94–6.24)	0.06	3.58 (1.90–6.76)	<0.001
BMI classification
Under/normal weight	0.70 (0.44–1.11)	0.13	0.57 (0.27–1.16)	0.12	0.79 (0.43–1.46)	0.46
Overweight/obese	1.42 (0.90–2.26)	0.13	1.77 (0.86–3.63)	0.12	1.25 (0.68–2.29)	0.46

BP: back pain, PHV: peak height velocity, BMI: body mass index.