Table 3. Response to chemotherapy and serum YKL-40 levels.

Clinical response	All patients	YKL-40 (high) (%)	YKL-40 (low) (%)	p-value
CR	32	14 (43.8)	18 (56.2)
PR	33	24 (72.7)	9 (27.3)
SD	35	28 (80.0)	7 (20.0)
PD	20	15 (75.0)	5 (25.0)
Response (CR+PR)	65	38 (58.5)	27 (41.5)	0.031*
Non-response (SD+PD)	55	43 (78.2)	12 (21.8)

CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease.

*Significant difference.