. 2020 Jan 24;6:194. doi: 10.3389/fnut.2019.00194

Table 2.

Background descriptive statistics by age-group in male subjects.

	N	Young				Middle-aged				Senior
		N = 98				N = 278				N = 224
Age (y)	600	27.0^a	30.5^b	34.0^c	(29.8 ± 4.4)	40.0^a	47.0^b	54.0^c	(47.2 ± 7.5)	65.0^a	68.0^b	75.0^c	(70.3 ± 6.7)
Weight (kg)	600	61^a	68^b	74^c	(71 ±14)	64^a	68^b	75^c	(70 ±11)	57^a	63^b	70^c	(64 ± 9)
BMI (kg/m²)	599	20.4^a	22.9^b	24.9^c	(23.6 ± 4.4)	21.7^a	23.7^b	25.8^c	(24.0 ± 3.3)	21.8^a	23.5^b	25.8^c	(23.8 ± 2.9)
VFA (cm²)	600	54^a	82^b	122^c	(93 ± 58)	79^a	104^b	136^c	(109 ± 45)	82^a	112^b	146^c	(114 ± 46)
Energy (kJ)	600	6854^a	8263^b	9544^c	(8393 ± 2397)	7283^a	8586^b	10318^c	(8899 ± 2351)	7662^a	9061^b	10939^c	(9481 ± 2636)
%Protein	600	12.9^a	14.8^b	16.5^c	(15.1 ± 2.9)	13.2^a	14.6^b	16.2^c	(14.9 ± 2.4)	14.0^a	15.9^b	17.8^c	(16.2 ± 2.9)
%Fat	600	22.9^a	26.5^b	30.6^c	(26.6 ± 5.8)	21.2^a	24.8^b	28.6^c	(25.0 ± 5.5)	21.6^a	25.6^b	28.5^c	(25.1 ± 5.2)
%Carbohydrate	600	53.0^a	58.1^b	64.3^c	(58.3 ± 7.9)	55.7^a	60.0^b	64.9^c	(60.0 ± 7.2)	54.0^a	58.3^b	63.3^c	(58.7 ± 7.2)
Farmer: Yes	600	34% (33)				33% (91)				50% (111)
Exercise: Yes	600	51% (50)				64% (177)				52% (116)
Smoking: Yes	600	41% (40)				36% (99)				16% (35)
No		47% (46)				27% (76)				49% (110)
Previous		12% (12)				37% (103)				35% (79)
Alchol: Yes	600	51.0% (50)				73.0% (203)				68.3% (153)
No		45.9% (45)				24.5% (68)				19.6% (44)
Previous		3.1% (3)				2.5% (7)				12.1% (27)

a, b, and c represent the lower quartile a, the median b, and the upper quartile c for continuous variables. x±s represents $\bar{X} \pm 1$ SD. Numbers after percents are frequencies. Young, Middle-aged, and Senior are defined as 20 to 34 years old, 35 to 59 years old, and 60 and older, respectively. BMI, body mass index; VFA, visceral fat area.