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Table 2 Changes within groups (Intention-to-treat)

From: Implementation of specific strength training among industrial laboratory technicians: long-term effects on back, neck and upper extremity pain

  Group Time Differences of least squares means (SE) P
Neck 0 1 2 0.31(0.12) 0.008
0 1 3 0.70(0.13) <0.001
0 2 3 0.38(0.13) 0.004
1 1 2 0.92(0.12) <0.001
1 1 3 0.85(0.13) <0.001
1 2 3 -0.06(0.14) 0.633
Right shoulder 0 1 2 0.49(0.12) <0.001
0 1 3 0.92(0.13) <0.001
0 2 3 0.43(0.14) 0.002
1 1 2 0.90(0.12) <0.001
1 1 3 0.79(0.13) <0.001
1 2 3 -0.11(0.14) 0.441
Right hand 0 1 2 0.18(0.10) 0.076
0 1 3 0.36(0.11) 0.002
0 2 3 0.18(0.12) 0.123
1 1 2 0.53(0.10) <0.001
1 1 3 0.62(0.11) <0.001
1 2 3 0.08(0.12) 0.480
Low back 0 1 2 -0.04(0.12) 0.717
0 1 3 0.42(0.14) 0.002
0 2 3 0.46(0.14) <0.001
1 1 2 0.38(0.12) 0.002
1 1 3 0.48(0.13) <0.001
1 2 3 0.11(0.14) 0.452
Dash 0 1 2 5.19(0.95) <0.001
0 1 3 7.70(1.06) <0.001
0 2 3 2.51(1.08) 0.021
1 1 2 9.96(0.97) <0.001
1 1 3 9.70(1.03) <0.001
1 2 3 -0.26(1.10) 0.812
  1. Time wise Changes within groups (0 = second intervention group, 1 = first intervention group ) for Pain and disability index (DASH) and pain intensity (0–9 scale) the last 7 days in the Neck and Right Shoulder, Right Hand and Low Back (Time: 1 = baseline, 2 = 20 weeks follow-up and 3 = one-year follow up). P-value for post hoc t-tests.