Table 3

Primary outcome measure—Low back pain intensity

Treatment groupGroup differenceP value*
Chiropractic careIntegrated careChiropractic care minus integrated care
Low back pain intensity [0 to 10; 0 = no LBP, 10 = the worst LBP possible]
 Mean at baseline (SD)5.4 (1.5)5.1 (1.6)
 Mean at week 4 (95%CI)4.5 (4.1 to 4.9)4.0 (3.7 to 4.4)0.42 (−0.02 to 0.86)0.07
 Mean at week 12 (95%CI)3.1 (2.7 to 3.4)2.7 (2.4 to 3.1)0.37 (−0.12 to 0.85)0.14
Short term response summary (area under the curve minus baseline through week 12)0.41 (−0.02 to 0.85)0.06
 Mean at week 26 (95%CI)3.8 (3.4 to 4.2)3.4 (3 to 3.7)0.45 (−0.13 to 1.04)0.13
 Mean at week 52 (95%CI)3.7 (3.3 to 4)3.0 (2.7 to 3.4)0.62 (0.04 to 1.21)0.04
Long term response summary (area under the curve minus baseline through week 52)0.46 (0.07 to 0.86)0.02

Mean values adjusted for baseline

*Long term response summary serves as the omnibus test p-value. If p > .05, p-values for short term response summary and individual time points are not computed

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