Shoulder pain in primary care: diagnostic accuracy of clinical examination tests for non-traumatic acromioclavicular joint pain

Table 2 Demographic information

Participant characteristics	All participants (N=188)		PAR group (n=22)	NAR group (n=131)
	Mean (SD)	Range	Mean (SD)	Mean (SD)
Age (years)	42 (13)	18 - 81	41 (13)	43 (14)
Height (cm)	172 (10)	147 - 199	170 (11)	172 (10)
Weight (kg)	80.4 (16.7)	50.3 – 135.4	78.5 (16.1)	80.4 (17.0)
Symptom duration (weeks)^†	7 (14)^†	0 – 175	6 (18)^†	8 (14)^†
Worst pain in last 48 hrs (100mm VAS scale)	62 (23)	3 – 100	59 (17)	65 (22)
SF8 physical component score (%)	44 (8)	23 – 61	45 (7)	44 (8)
SF8 mental component score (%)^†	54 (11)^†	27 – 66	57 (11)^†	54 (10)^†
SPADI pain score (%)	50 (22)	0 – 100	49 (15)	51 (21)
SPADI disability score (%)^†	26 (30)^†	0 – 96	26 (21)^†	28 (30)^†
SPADI total (%)	37 (20)	0 – 98	35 (13)	38 (21)
FABQ physical activity score (%)	65 (22)	0 – 100	64 (20)	65 (67)
FABQ work score (%)^a†	21 (44)^†	0 – 81	32 (47)^†	21 (44)^†
FABQ total score (%)^a	41 (19)	0 – 87	45 (18)	41 (18)
% male gender	52		55	56
% right hand dominant	87		86	87
% dominant arm affected	52		36	55
% Pain onset: traumatic	38		32	40
% Pain onset: non-traumatic	62		68	61
% Pain onset: strain injury	40		36	41
% Pain onset: repetitive activity	13		27	10*
% Pain onset: insidious	9		5	10

Abbreviations. PAR, positive anaesthetic response (≥80% post-injection reduction in pain intensity); NAR, negative anaesthetic response (<80% reduction in post-injection pain intensity); VAS, 100 mm visual analogue pain score in previous 48 hours; SPADI, Shoulder Pain & Disability Index; FABQ, Fear Avoidance Beliefs Questionnaire.
^aonly cases ‘in paid employment’ used in analysis.
^†Variables were not normally distributed. Median (interquartile range) values are presented.
*P<0.05.