Table 2.

Subject characteristics for each of the practice settings

Characteristic	Physician offices	Corporate physical therapy clinics	Occupational medicine	Hospital-based	Private physical therapy practices	Total
Gender	Male	3,621	15,744	2,449	1,738*	27,616*	51,168
	Female	1,478*	5,875	1,079*	587	10,119	19,138
Age group (years)	18–30	725	3,104	696*	404*	5,297*	10,226
	31–40	1,022	4,551	878*	473	8,072*	14,996
	41–50	1,541	6,671*	1,029	674	11,488	21,403
	51–60	1,300*	5,410*	685	583*	9,448*	17,426
	Over 60	511*	1,883	240	191	3,430*	6,255
Degree of chronicity (days)	Acute 0–30	1,508	7,191*	2,405*	966*	10,274	22,344
	Sub-acute 31–90	1,130	5,561*	555	573	10,000*	17,819
	Chronic >90	2,461*	8,867	568	786	17,461*	30,143
Body segment treated	UE	673*	2,754	422	314*	5,023*	9,186
	LE	578*	2,234*	430*	222	3,456	6,920
	Back	1,643*	6,100	1,284*	739*	10,652	20,418
	Neck	241*	740	58	45	1,330*	2,414
	Hand	188*	712*	289*	95*	1,001	2,285
	Multiple	1,776	9,079*	1,045	910	16,273*	29,083
Surgical intervention	Yes	1021	5,269*	142	386	9,561*	16,379
	No	4,078*	16,350	3,386*	1,939*	28,174	53,927
Prior W/C Claim	No	4,121*	17,084	2,756	1,891*	30,926*	56,778
	Yes	978	4,535*	772	434*	6,809	13,528

Cells with observed frequency exceeding expected frequency are highlighted by * (p < .01)