Table 2.

Gender and age stratum specific median levels of serum TBA

Age	Male		Female		p
	n	TBA, μmol/L	n	TBA, μmol/L
< 20	189	2.9 (1.9–4.6)	179	3.0 (1.8–5.1)	< 0.01
20~29	9099	3.4 (2.2–5.4)	10,283	2.9 (1.9–4.5)	< 0.01
30~39	18,094	3.2 (2.1–5.1)	16,062	2.6 (1.7–4.1)	< 0.01
40~49	22,738	3.3 (2.1–5.2)	18,851	2.7 (1.7–4.2)	< 0.01
50~59	18,852	3.4 (2.2–5.4)	15,243	2.9 (1.9–4.7)	< 0.01
60~69	8377	3.6 (2.4–5.8)	6445	3.2 (2.1–5.2)	< 0.01
≥ 70	5184	4.2 (2.8–6.9)	2740	3.9 (2.5–6.2)	< 0.01
Total	82,533	3.4 (2.2–5.4)	69,803	2.8 (1.8–4.5)	< 0.01

Data are shown as median (Q1–Q3 quartiles). P values from analysis of the Kruskal-Wallis H test. Two-tailed p < 0.05 was considered statistically significant. TBA total bile acid