Table 2.

Correlations between the SARS severity ranks derived from eight seriation methods using number of days after the onset of disease and clinical pulmonary infection score (CPIS).

Seriation method	Pearson correlation (days)	Pearson correlation (CPIS)
(a) SVD1	0.6303	0.5006
(b) SVD2	0.3276	0.1873
(c) SOM	0.4028	0.2925
(d) R2E	0.6497	0.4890
(e) HCT_RAM	0.1551	0.0230
(f) HCT_OPT	0.4249	0.5006
(g) HCT_SOM	0.6468	0.3151
(h) HCT_R2E	0.6693	0.5116