Table 2. Damage in hand joints: cross-tabulation of 511 patients by the number of hand joints damaged in symmetric pairs and the number of hand joints damaged ‘singularly’ at last observation.

	No. symmetrically damaged joints
No. singularly damaged joints	0	2-6	8-12	14-18	20-24	26-30
0	341∗	22	2	2	0	4
	341†	1.19	0	0	0.01	0.8
	(0)‡	(364.31)	(1197.17)	(2398.34)	(0.01)	(12.84)
1-2	64	21	4	2	1	2
	99.25	5.2	0.18	0.09	0.7	1.06
	(12.52)	(48.06)	(79.94)	(43.19)	(0.13)	(0.84)
3-4	16	10	3	1	0
	19.44	7.84	1.27	0.67	1.91
	(0.61)	(0.59)	(2.34)	(0.16)	(1.91)
5-6	2	7	1	2	0
	6.46	7.9	2.97	1.01	0.22
	(3.07)	(0.10)	(1.31)	(0.96)	(0.22)
>6	3	1	0	0
	2.65	6.40	2.61	0.18
	(0.05)	(4.56)	(2.61)	(0.18)

^∗Observed value

^†Expected value

^‡Contribution to the test statistic

Observed data: G=4176.03; Simulated samples: max. G=536.31, 95% <32.09, 99% <125.38.