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Table 2 Within and between-group changes in the outcomes (pain, disability, FHP, endurance, and QoL)

From: Adding a smartphone app to global postural re-education to improve neck pain, posture, quality of life, and endurance in people with nonspecific neck pain: a randomized controlled trial

  

Mean ± SD

Within-group

Between-groups

Variable

Groups

Baseline

8 weeks

Change relative to baseline§ (%)

Effect size† and 95% confidence interval (lower limit–upper limit)

p

Interaction effects

P

Pain, VAS

GPR+ AF

7.3 ± 0.9

4.4 ± 1.7

39.7% ↓

0.89 (0.34 to 1.64)

0.01‡

F = 7.45

P = 0.03Ω

0.031*

0.041Ф

GPR alone

6.7 ± 1.2

5.8 ± 1.05

13.4% ↓

0.23 (0.26 to 1.22)

0.06

Control

6.4 ± 1.8

6.9 ± 1.6

9.3% ↑

− 0.06 (− 0.04 to 0.38)

0.45

Disability, degree

GPR+ AF

36.3 ± 6.1

19.3 ± 6

46.8% ↓

0.98 (0.6 to 2.45)

0.01‡

F = 24.33

P = 0.01Ω

0.001*

0.031Â¥

0.037Ф

GPR alone

34 ± 6.6

28.5 ± 5.3

16.2% ↓

0.56 (0.38 to 1.27)

0.04‡

Control

37 ± 7.4

39.3 ± 6.4

2.5% ↑

− 0.04 (− 0.01 to 0.55)

0.41

FHP, degree

GPR+ AF

38.5 ± 4.3

42.1 ± 3.6

9.3% ↑

− 0.68 (− 1.9 to − 0.22)

0.02‡

F = 18.83

P = 0.02Ω

0.001*

0.021Â¥

0.047Ф

GPR alone

38.9 ± 3.3

40.9 ± 2.4

5.1% ↑

− 0.56 (− 1.64 to − 0.39)

0.03‡

Control

39.8 ± 2.4

39.4 ± 2.7

1% ↓

− 0.09 (− 0.06 to 1.01)

0.36

Endurance, scale

GPR+ AF

49.5 ± 12.8

60.2 ± 17.6

21.6% ↑

− 0.75 (− 1.27 to − 0.11)

0.01‡

F = 14.65

P = 0.03Ω

0.001*

0.001Â¥

0.039Ф

GPR alone

58 ± 16.8

66.7 ± 15.3

15% ↑

− 0.46 (− 0.91 to − 0.04)

0.02‡

Control

46.9 ± 10.5

46.3 ± 9.3

1.3% ↓

0.04 (− 0.06 to 1.01)

0.67

Quality of life, scale

GPR+ AF

69.1 ± 4.0

78.5 ± 3.6

13.6% ↑

− 0.77 (− 1.9 to − 0.22)

0.03‡

F = 11.67

P = 0.03Ω

0.001*

0.009Â¥

GPR alone

69.2 ± 4.5

77.5 ± 5.5

12% ↑

− 0.76 (− 1.64 to − 0.39)

0.03‡

Control

69.8 ± 6

71.6 ± 7.7

2.6% ↑

− 0.11 (− 0.09 to 0.68)

0.53

  1. Abbreviations: GPR group global postural reeducation group, GPR + AF group global postural reeducation + acoustic feedback group, VAS visual analog scale, FHP forward head posture
  2. *Significant between combined global postural reeducation with acoustic feedback and control groups
  3. ¥Significant between global postural reeducation alone and control groups
  4. ФSignificant between combined global postural reeducation with acoustic feedback and global postural reeducation alone groups
  5. §Percent change (↓ decrease, ↑ increase)
  6. ‡Significant within group improvement between the baseline and 8-week treatment period
  7. ΩSignificant group × time interaction