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Table 1 Categorical (Chi square test for gender, Fishers test for others—for comparisons between groups) and continuous (T-tests and Wilcoxon for normal and non-normal distributions) baseline characteristics by group: HA versus saline

From: Hyaluronic acid injections for chronic tennis elbow

Parameter

Category

Group HA

N (%)

Group saline

N (%)

P-value

Age (years)*

Age

51.9 (SD 10.6)

52.9 (SD 8.9)

0.800

Gender

Female

7 /17 (41.2)

3 /13 (23.1)

0.297

 

Male

10 /17 (58.8)

10 /13 (76.9)

 

Handedness

Left

1 /17 (5.9)

1 /14 (7.1)

1.00

 

Right

16 /17 (94.1)

13 /14 (92.9)

 

Occupation

Manual

3 /17 (17.6)

4 /14 (28.6)

0.115

 

Office

13 /17 (76.5)

6 /14 (42.9)

 
 

Retired

1 /17 (5.9)

4 /14 (28.6)

 

BMI

BMI

25.9 (SD 3.2)

27.1 (SD 4.1)

0.463

Painful side

Left

8 /16 (50.0)

7 /14 (50.0)

1.00

 

Right

8 /16 (50.0)

7 /14 (50.0)

 

Pain Duration (months)

Pain Duration

28.1 (SD 22.0)

51.4 (SD 59.9)

0.936

VAS pain (in the past week how much pain do you feel when gripping something—on average?)

VAS pain

76.4 (SD 12.1)

72.1 (SD 11.9)

0.348

PRTEE Score

PRTEE

67.0 (SD 14.6)

71.9 (SD 14.5)

0.357

QuickDASH

QuickDASH

53.7 (SD 18.90

58.8 (SD 13.1)

0.408

Racquet sports

No

15 /17 (88.2)

13 /14 (92.9)

1.00

 

Yes

2 /17 (11.8)

1 /14 (7.1)

 
  1. HA—Hyaluronic Acid, PRTEE—patient-rated tennis elbow evaluation, QuickDASH—Quick Disabilities of the Arm, Shoulder and Hand Score, VAS—Visual Analog Score
  2. *T test