Table 2. The percentages of students at the primary, junior high, and high school levels reporting pain both “before” and “now”.

	Primary school level			Junior high school level			High school level
	C	Th	L	C	Th	L	C	Th	L
A	80.00%	33.33%	66.67%	40.00%	55.56%	59.38%	35.00%	45.45%	75.61%
B	20.00%	66.67%	33.33%	60.00%	44.44%	40.63%	65.00%	54.55%	24.39%

A: % of people declaring pain “now” to declaring pain “before”, B: percentage % of people reporting fewer pain sensations “now” than “before”, C: cervical spine, Th: thoracic spine, L: lumbar spine