Table 3. Plasma Hcy levels stratified by age and sex in AF patients.

Age groups, yrs	Men		Women
	n	Hcy, µmol/L	n	Hcy, µmol/L
< 35	90 (85.7%)	13.7 ± 3.6	15 (14.3%)	11.9 ± 2.7*
35–44	162 (81.8%)	14.1 ± 3.2	36 (18.2%)	12.5 ± 2.9*
45–54	477 (85.9%)	13.9 ± 3.3	78 (14.1%)	13.0 ± 3.0※
55–64	522 (61.5%)	14.4 ± 3.4	327 (38.5%)	13.1 ± 3.1*
65–74	300 (49.0%)	17.3 ± 4.8	312 (51.0%)	14.2 ± 3.7*
≥ 75	132 (54.3%)	18.6 ± 5.2	111 (45.7%)	15.3 ± 4.5*
All	1683 (65.7%)	15.1 ± 4.1	879 (34.3%)	13.7 ± 3.6

*P < 0.01, women vs. men at the same age group; ^※P < 0.05, women vs. men at the same age group. AF: atrial fibrillation; Hcy: homocysteine.