Age- and gender-specific dynamics and next-generation reference intervals for pepsinogen in northern China

Table 2 Pairwise comparison of pepsinogen I and pepsinogen II levels among different age groups

Comparison groups (age, years)	P value
	PG I	PG II
20-29 vs 30-39	1	1
20-29 vs 40-49	0.82	0.266
20-29 vs 50-59	0.001	< 0.001
20-29 vs 60+	< 0.001	< 0.001
30-39 vs 40-49	0.296	0.144
30-39 vs 50-59	< 0.001	< 0.001
30-39 vs 60+	< 0.001	< 0.001
40-49 vs 50-59	0.001	< 0.001
40-49 vs 60+	< 0.001	< 0.001
50-59 vs 60+	0.325	0.057

PG: Pepsinogen.