Table 2.

Recurrence of spinal pain in the last month

	6-9 years N=99(%)	10-12 years N=126(%)	13-16 years N=134(%)	6-16 years N=359(%)
Once	42.4	29.4	28.4	32.6
Once a week	38.4	46.0	44.0	43.2
Repeatedly a week	15.2	17.5	18.7	17.3
Daily	4.0	7.1	9.0	7.0