Table 3. Activity in hand joints: cross-tabulation of 704 patients by the number of hand joints active in symmetric pairs and the number of hand joints active ‘singularly’ at last observation.

	No. symmetrically active joints
No. singularly active joints	0	2-6	8-12	14-18	20-24	26-30
0	47∗	8	1	2	4	23
	47†	2.43	0.14	0.22	2.16	3.58
	(0) ‡	(12.81)	(5.15)	(14.07)	(1.57)	(0.01)
1-2	62	42	7	14	26	37
	69.30	23.75	3.57	2.48	13.58	32.55
	(0.77)	(14.02)	(3.29)	(53.56)	(11.36)	(0.61)
3-4	39	49	34	22	41
	49.2	46.40	14.37	15.94	40.67
	(2.12)	(0.15)	(26.84)	(2.3)	(0.003)
5-6	27	56	36	35	5
	31.16	57.88	32.80	40.84	8.88
	(0.56)	(0.06)	(0.31)	(0.83)	(1.7)
>6	17	25	39	6
	20.36	63.49	47.57	13.69
	(0.55)	(23.34)	(1.54)	(4.32)

^∗Observed value

^†Expected value

^‡Contribution to the test statistic

Observed data: G=181.83; Simulated samples: max. G=44.63, 95% <28.60, 99% <35.84.