Association between Pain in Adolescence and Low Back Pain in Adulthood: Studying a Cohort of Mine Workers

Table 5

Variance analysis using mean values of one-month low back pain (LBP) intensity and 12-month prevalence of LBP, compared to the mean value of the two periods of daily self-reported LBP by text message- (TM-), presented by gender. was considered statistically significant.

	Text message period 1				Text message period 2
		Mean (SD)	value			Mean (SD)	-value
LBP intensity, female	None	1.05 (1.41)	0.001	LBP intensity, female	None	0.96 (1.68)	0.415
	Low	.72 (.63)			Low	1.16 (1.55)
	Moderate	2.20 (1.61)			Moderate	1.87 (1.75)
	High/very high	3.45 (1.30)			High/very high	2.17 (1.51)
LBP intensity, male	None	.62 (.88)	<0.001	LBP intensity, male	None	.63 (.77)	<0.001
	Low	.75 (.68)			Low	.71 (.82)
	Moderate	1.31 (1.29)			Moderate	1.82 (1.72)
	High/very high	3.72 (2.31)			High/very high	3.15 (1.70)
LBP intensity, all	None	.72 (1.03)	<0.001	LBP intensity, all	None	.70 (1.03)	<0.001
	Low	.74 (.65)			Low	.95 (1.25)
	Moderate	1.72 (1.49)			Moderate	1.84 (1.71)
	High/very high	3.58 (1.74)			High/very high	2.66 (1.58)
LBP 12-month prev., female; (n = 47)	No	.60 (.69)	0.058	LBP 12-month prev., female	No	.17 (.22)	0.049
	Yes	1.78 (1.56)			Yes	1.72 (1.69)
LBP 12-month prev., male	No	.71 (.91)	0.089	LBP 12-month prev., male	No	.70 (.79)	0.026
	Yes	1.24 (1.45)			Yes	1.51 (1.61)
LBP 12-month prev., all	No	.69 (.86)	0.004	LBP 12-month prev., all	No	.61 (.75)	0.002
	Yes	1.50 (1.52)			Yes	1.61 (1.64)