Table 1.

Cross-table of dual patterns classified simultaneously by categories of dual pattern similarity and the incremental combination of the Four Examinations.

Four Examinations	Dual pattern similarity, S						Total
	No similarity	Negligible	Weak	Moderate	Strong	Perfect
Ip	1708	632	220	57	6	5	2628
Ip+AO	1654	748	182	37	2	5	2628
Ip+AO+Iq	1339	1253	32	3	1	0	2628
Ip+AO+Iq+p	1088	1480	54	5	1	0	2628

Ip = Inspection; AO = Auscultation and Olfaction; Iq = Inquiry; P = Palpation.

For S≥: γ = 0.192, 95% CI = [0.165, 0.219], P < 0.01; γ*² ≈ 2%.

For S>: γ = -0.646, 95% CI = [-0.688, -0.604], P < 0.01; γ*² ≈ 24%.