Table 1.

Mean and range (5th and 95th percentiles) of IGF-I and IGFBP-3 concentrations for cases and controls

Original study
Extended study
Cases (n = 87)Controls (136)PCases (n = 138)Controls (n = 259)P
IGF-I (ng/mL)
Original method229.7 (129.0-323.0)217.5 (110.0-347.0)0.02
DSL ELISA294.1 (172.3-410.8)279.0 (147.1-428.4)0.04303.1 (174.1-428.9)287.5 (165.7-434.5)0.01
IGFBP-3 (ng/mL)
Original method3,507 (2,200-4,800)3,332 (2,000-4,625)0.16
DSL ELISA3,807 (2,620-4,844)3,635 (2,571-4,836)0.103,907 (2,634-5,339)3,723 (2,532-5,028)0.04
Functional IGFBP-32,440 (905-4,560)2,562 (1,290-4,040)0.112,848 (1,070-5,025)2,926 (1,410-4,890)0.19