Insulin-like growth factor-1, IGF binding protein-3, and the risk of esophageal cancer in a nested case-control study

Table 1 Selected baseline characteristics of case and control group n (%)

	Cases	Controls	P value
Number of subjects	31	86
Age	61.5 ± 7.3	61.3 ± 7.2	0.811
Male	25 (80.6)	75 (87.2)	0.3831
Height	162.5 ± 10.5	161.5 ± 5.3	0.495
Weight	57.0 ± 12.9	59.0 ± 9.1	0.352
BMI (kg/m2)	21.5 ± 4.2	22.7 ± 3.1	0.112
Cigarette smoking	30	77	0.3841
Never	6 (20.0)	25 (32.5)
Past	5 (16.7)	14 (18.2)
Current	19 (63.3)	38 (49.3)
Alcohol intake	29	84	0.4101
Never	6 (20.7)	21 (25.0)
Past	3 (10.3)	3 (3.6)
Current	20 (69.0)	60 (71.4)
IGF1	122.4 ± 59.9	140.8 ± 59.8	0.145
IGFBP3	2.82 ± 0.95	3.30 ± 0.97	0.020

¹Fisher’s exact test. IGF1: Insulin-like growth factor-1; IGFBP3: IGF-binding protein-3.