Table 4: Correlation of cystatin C with clinical stage of the disease and IPI.

GroupNo.Clinical stage Correlation coefficient (r) P value
IIIIIIIV

All patientsa523242140,2500,074
Aggressive41219173 0,046
 Extranodal 23212720,2420,265
 Nodal187101 0,046

IPI stage
01234

Aggressive413131375 0,001
 Extranodal 2388340,3980,060
 Nodal 1844541 0,013

Statistically significant correlation.
aTotal group of patients.
**Statistically highly significant correlation.