Table 4.

Association between baseline urinary PGE-M levels and subsequent risk of pancreatic cancer by BMI

Urinary PGE-M levels by BMI	Cases	Controls	* OR (95%CI)	** Adjusted OR (95%CI)
Subjects with BMI < 25 (by quartile)	163	301
Q1 (low)	35	82	1.00 (ref.)	1.00 (ref.)
Q2	43	83	1.30 (0.72–2.35)	1.42 (0.77–2.60)
Q3	37	64	1.52 (0.81–2.88)	1.64 (0.85–3.13)
Q4	48	72	2.00 (1.02–3.91)	2.18 (1.09–4.35)
P for trend			0.046	0.031
Subjects with BMI ≥ 25 (by quartile)	76	182
Q1 (low)	12	39	1.00 (ref.)	1.00 (ref.)
Q2	22	38	2.10 (0.90–4.92)	2.19 (0.92–5.21)
Q3	21	57	1.38 (0.58–3.28)	1.44 (0.60–3.48)
Q4	21	48	1.77 (0.71–4.15)	1.72 (0.70–4.77)
P for trend			0.488	0.506

^*ORs and 95 CIs were derived from conditional logistic models.

^**ORs and 95 CIs were derived from conditional logistic models, with adjustment for BMI, family history of cancer, smoking status, alcohol consumption, regular exercise, regular aspirin use, and NSAIDs use in 7 days before blood collection.