Table 3. Different characteristics of the KORA S4 population stratified by quintiles of the serum BCAA^a concentration, given as mean and SD as well as percentage and absolute quantity.

	Quintiles of the sum of BCAAs
Quintile	1	2	3	4	5
(µmol/l)	(163.5–363.7)	(364.1–418)	(418.2–476.9)	(477–542.2)	(542.3–963)
Age	63.08±5.41	63.27±5.38	63.5±5.62	63.6±5.42	62.94±5.29
Weight	69.45±11.77	75.5±2.72	76.11±11.18	81.64±12.39	84.32±11.93
Height	161.35±7.48	164.65±8.73	165.77±9.13	168.86±8.77	168.51±8.38
Body Mass Index	26.64±4.08	27.85±4.27	27.75±4	28.63±3.75	29.79±4.15
Fat Free Mass (kg)	44.13±7.34	49.41±9.08	50.19±8.72	54.75±8.83	55.72±8.12
Body Fat Mass (%)	36.1±6.34	34.37±6.88	34±7.15	32.73±6.82	33.74±6.68
FFMIb	16.87±2.02	18.11±2.25	18.15±2.05	19.09±1.89	19.55±1.89
BFMIc	9.77±2.88	9.74±3.08	9.6±3.15	9.54±2.97	10.25±3.24
FFM/BFMd	1.89±0.81	2.05±0.73	2.08±0.69	2.19±0.67	2.09±0.66
Male	19.69% (38)	42.49% (82)	49.74% (96)	67.88% (131)	71.5% (138)
Female	80.31% (155)	57.51% (111)	50.26% (97)	32.12% (62)	28.5% (55)
Sports activitye	47.15% (91)	35.75% (69)	52.33% (101)	40.93% (79)	37.31% (72)

^aBCAAs, sum of valine, isoleucine, and leucine;

^bFat Free Mass Index;

^cBody Fat Mass Index;

^dFat Free Mass divided by Body Fat Mass;

^eSports (active: >1 h leisure time of sports per week on a regular basis; inactive: less than 1 h sports per week).