The relationship between cervical flexor endurance, cervical extensor endurance, VAS, and disability in subjects with neck pain

Table 1 Subject characteristics for each group

Characteristic	Acute/subacute pain (n = 13)	Chronic pain (n = 17)	p
Age,y, X(SD)*	45.62 (11.65)	42.59 (13.77)	0.53
Male/Female (n)***	4/9	8/9	0.36
Symptoms localization (n)^a***	1/0/1/4/7	0/1/4/12	0.42
Frequency (n)^b**	6/7/0	2/12/3	0.05
Upper extremity irradiation: yes/no (n)***	10/3	10/7	0.29
Other symptoms (n)^c	2/5/3/3	4/4/1/8	0.31

Differences between groups were analyzed with a Student unpaired t test*, a Mann–Whitney U test**, or a Chi-square test*** as appropriate.
^aThe categories for the characteristic “symptoms localization” are: upper cervical spine/lower cervical spine/trapezius muscle and shoulder/two areas/three areas.
^bThe categories for the characteristic “frequency” are: sometimes/often/constant.
^cThe categories for the characteristic “other symptoms” are: no symptoms/headache/vertigo or dizziness/headache and other.

ISSN: 2045-709X