Kisspeptin Protein in Seminal Plasma Is Positively Associated with Semen Quality: Results from the MARHCS Study in Chongqing, China

Table 1

Subjects’ demographic characteristics, semen parameters, and kisspeptin levels.

Characteristics	N	Value^1
Age, y	666	21 (21, 22)
Abstinence time, days	665	4 (3, 5)
BMI grade, kg/m^2
<18.5	53	8.0%
18.5-23.9	498	75.3%
24.0-27.9	90	13.6%
>28	20	3.0%
Smoke
Never	484	72.7%
Ever	35	5.3%
Current	147	22.1%
Sperm concentration, 10^6/ml	655	52.0 (33.2, 81.7)
Semen volume, ml	655	3.5 (2.7, 4.6)
Total sperm number, 10^6	655	193.3 (110.6, 311.0)
Progressive motility, %	655	57.0 (44.8, 67.7)
Total motility, %	655	89.4 (80.6, 94.8)
Total motile sperm count, 10^6	655	109.82 (52.8, 184.4)
Sperm Morphology, %	652	10.5 (7.0, 15.7)
Kisspeptin A, pg/ml	626	448.9 (296.0, 668.6)
Kisspeptin B, ug/ml	631	28.0 (18.0, 52.0)
Total kisspeptin, ug	626	101.3 (60.0, 196.8)

¹Presented as median (25th, 75th percentile) or percentage.
Kisspeptin A: kisspeptin in blood plasma; Kisspeptin B: kisspeptin in seminal plasma.