The expression of substance P and calcitonin gene-related peptide is associated with the severity of tendon degeneration in lateral epicondylitis

Table 1 Patient Demographics and Clinicopathological Data

Variables	No. (%) or Mean ± SD
Gender
Male	14 (48.28)
Female	15 (51.72)
Age (years)	48.41 ± 10
Job^a
Housekeeping	4 (13.79)
White-collar	12 (41.38)
Blue-collar	13 (44.83)
Industrial accident compensation^a
No	27 (96.4)
Yes	2 (7.1)
Affected arm^a
Dominant	25 (86.21)
Non-dominant	4 (13.79)
Smoking^a
No	22 (85.86)
Yes	7 (24.13)
Alcohol consumption^a
None	20 (68.96)
Social	7 (24.13)
Heavy^c	2 (6.9)
Plain radiograph at operation^a
Normal	13 (44.83)
Abnormal^d	16 (55.17)
Body mass index (kg/m²)	23.74 ± 3.08
Preoperative
Symptom duration (months)	22.31 ± 15.91
VAS score	4.62 ± 1.21
DASH score	58.31 ± 13.63
Postoperative^a
VAS score	0.9 ± 1.3
DASH score	15.1 ± 12.7
Postoperative range of motion^{a, b}
Full	27 (96.4)
Limited	2 (7.1)
Neuropeptide expression
SP	2.05 ± 1.29
CGRP	5.11 ± 5.03

SD Standard deviation, SP Substance P, CGRP Calcitonin gene-related peptide, ^acategorical variables, ^bevaluated at two-year follow-up (two years after operation). ^cindicates the patient who drinks on five or more days per month. ^§includes sclerotic change of the lateral condyle and calcification of the extensor tendon origin

ISSN: 1471-2474