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Table 3 Effects of the experimental period on numeric pain scale (NPS) score between and within groups of treatment (SMT vs. HAM)

From: Effect of spinal manipulative treatment on cardiovascular autonomic control in patients with acute low back pain

Experiemental period
(n = 17)
SMT
(n = 10)
SHAM
(n = 7)
Significance between groups
D-2 50.50 (6.25) 42.85 (7.46) 0.43
D1PRE treatment 28.70 (6.24) 29.28 (7.46) 0.95
D1POST treatment 15.30 (6.24)b 25.71 (7.46) 0.28
D5 36.60 (6.24)a 40.57 (7.46) 0.68
D7PRE treatment 24.40 (6.24) 18.85 (7.46) 0.57
D7POST treatment 12.60 (6.24)b 18.14 (7.46) 0.57
All experimental period 28.01 (2.55) 29.23 (3.04) 0.75
Significance within groups 0.001* 0.09  
  1. D-2 refers to 2 days before the day of the first treatment (D1), D1PRE to just before the first treatment, D1POST to immediately after the first treatment, D5 to 5 days after the first treatment, D7PRE to just before the second treatment, and D7POST to immediately after the second treatment. Data are presented as the mean (SEM). Mean values followed by different letters (a, b) indicate a significant difference of experimental period within SMT group. Boldface * represent p < 0.05