Table 4

Reference intervals for serum pepsinogen (ng/mL) in gender and age specific groups in an apparently healthy Chinese population

	PGI			PGII		PGI/PGII
Age (years)	Median	2.5th	97.5th	Median	95th	Median	5th
Men
17–30	43.87^a	23.97	100.76	9.62^d	23.84	4.34^c	3.0
31–40	46.0^a	26.37	106.68	10.99^d	25.39	4.11^c	2.55
41–50	50.67	26.62	124.74	12.34	26.81	4.14^c	2.67
51–60	54.00^b	28.50	145.20	13.39^e	29.63	4.17^c	2.67
61–80	61.86^b	30.89	184.7	14.77^e	35.65	4.27^c	1.96
Total	50.31*	27.48	123.42	12.15*	26.67	4.17^**	2.63
Women
17–30	40.00^a	19.69	71.94	8.91^d	21.05	4.39^c	2.91
31–40	39.30^a	21.95	93.34	9.34^d	30.48	4.11^c	2.21
41–50	44.14^a	25.74	103.47	10.28^d	29.68	4.29^c	2.24
51–60	44.48^b	26.15	142.00	11.28^e	33.34	4.02^c	2.41
61–80	47.42^b	33.42	160.00	11.76^e	38.12	4.16^c	2.26
Total	42.36*	23.46	106.73	10.08*	28.96	4.17^**	2.37

Comparison of serum pepsinogen levels between men and women: *p<0.001, **p=0.431; p values for comparison of serum pepsinogen levels between different age groups in each gender group: a>0.05, b>0.05, c>0.05, d>0.05, e>0.05.
p<0.05 is considered statistically significant.
PG, pepsinogen.