Table 2.

Automobile manufacturing workers (n) included in direct instrumentation sub-study, by plant and department, and number of measurements obtained with each instrument.

Plant	Department	n	Wrist flexion/ extension measures*	Wrist radio/ulnar deviation measures*	Shoulder elevation measures*	Grip force measures*
SP	Inspection	10	10	13	6	1
SP	Large press	9	14	11	8	0
SP	Metal finishing	2	4	4	0	0
SP	Small press	1	0	1	0	2
SP	Spot welder	22	35	37	26	10
SP	All	44	63	66	40	13
EP	Tool store	1	1	2	0	0
EP	Cutter grind	2	4	4	0	2
EP	Cylinder head machining (700)	3	6	5	0	2
EP	Cylinder head machining (701)	1	2	2	2	0
EP	Cylinder block machining	2	4	3	4	1
EP	Camshaft machining	1	2	2	2	2
EP	Piston machining	3	4	4	2	0
EP	Connecting rod machining	2	4	4	2	4
EP	Rocker arm machining	2	4	4	4	0
EP	Engine assembly	14	24	25	22	15
EP	Piston assembly	1	2	2	0	2
EP	All	32	57	56	38	28
Total	Measurements*	76	120	122	78	41
Total	Subjects**	76	67	70	39	23

SP = stamping plant; EP = engine plant.

^*All measurements were bilateral, so total possible number of measurements was 2n.

^**The last row indicates the data used in the analyses. Some are unilateral measures and some are averaged bilateral measures.