Table 3

Percentage of cases with symptoms for each exposure group

	Exposure
Region (% pain in past 7 days)	Low physical, low psychosocial (1)	Low physical, high psychosocial (2)	High physical, low psychosocial (3)	High physical, high psychosocial (4)
Neck (34%):
Yes (n)	41	42	48	59
No (n)	74	67	124	109
Prevalence proportion	0.357	0.385	0.279	0.351
Differences in proportions:
(2)–(1)	0.029
(4)–(3)	0.072
[(4)–(3)]–[(2)–(1)]	0.043

Shoulders (35%):
Yes (n)	39	34	57	69
No (n)	76	75	115	99
Prevalence proportion	0.339	0.312	0.331	0.411
Differences in proportions:
(2)–(1)	−0.027
(4)–(3)	0.079
[(4)–(3)]–[(2)–(1)]	0.107

Elbows (17%):
Yes (n)	9	12	37	43
No (n)	106	97	135	125
Prevalence proportion	0.078	0.110	0.215	0.256
Differences in proportions:
(2)–(1)	0.032
(4)–(3)	0.041
[(4)–(3)]–[(2)–(1)]	0.009

Hands/wrists (35%):
Yes (n)	15	27	68	89
No (n)	100	82	104	79
Prevalence proportion	0.130	0.248	0.395	0.530
Differences in proportions:
(2)–(1)	0.117
(4)–(3)	0.134
[(4)–(3)]–[(2)–(1)]	0.017

Upper limbs (55%):
Yes (n)	48	55	98	115
No (n)	67	54	74	53
Prevalence proportion	0.417	0.505	0.570	0.685
Differences in proportions:
(2)–(1)	0.087
(4)–(3)	0.115
[(4)–(3)]–[(2)–(1)]	0.028