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Table 3 Improvement of VAS score due to various factor

From: Effect of arthrocentesis on the clinical outcome of various treatment methods for temporomandibular joint disorders

  VAS    
N Pre Post P value* Difference of VAS P value
Mean (SD) Mean (SD) Mean (SD)
Appliance treatment          0.1768a
 No splint 32 4.48 (1.94) 1.75 (1.92) < .0001 − 2.73 (1.88)  
 Splint tx 25 5.14 (2.02) 1.72 (1.88) < .0001 − 3.42 (1.87)  
Type of appliance tx          0.4002b
 No splint 32 4.48 (1.94) 1.75 (1.92) < .0001 − 2.73 (1.88)  
 ARS 9 5.00 (2.87) 1.33 (2.18) 0.0023 − 3.67 (2.50)  
 ARS and CRS 15 5.23 (1.50) 2.07 (1.71) < .0001 − 3.17 (1.46)  
Dx          0.9568b
 DD with locking 32 4.81 (2.30) 1.84 (1.92) < .0001 − 2.97 (1.84)  
 DD without locking 15 4.80 (1.74) 1.67 (1.72) < .0001 − 3.13 (2.07)  
 DJD 10 4.60 (1.26) 1.50 (2.17) 0.0008 − 3.10 (1.97)  
Muscle relaxants          0.6760a
 No 11 5.00 (2.41) 2.18 (1.78) 0.0004 − 2.82 (1.78)  
 Yes 46 4.72 (1.90) 1.63 (1.91) < .0001 − 3.09 (1.93)  
Locking period          0.0697a
 < 6 months 34 4.46 (2.24) 1.79 (1.97) < .0001 − 2.66 (1.96)  
 ≥ 6 months 23 5.24 (1.44) 1.65 (1.80) < .0001 − 3.59 (1.68)  
  1. P < 0.05 considered statistically significant
  2. DD disc displacement, DJD degenerative joint disease, ARS anterior repositioning splint, CRS centric relation splint
  3. *P value calculated by paired t test
  4. Difference = post − pre
  5. aP value calculated by t-test
  6. bP value calculated by ANOVA