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Table 2 General characteristics of participants across two groups of NEAP and PRAL

From: The association of dietary acid load (DAL) with estimated skeletal muscle mass and bone mineral content: a cross-sectional study

Variables

NEAP (mEq/day)

 

PRAL (mEq/day)

T1(n = 130)

T2(n = 131)

T3(n = 130)

†P-value

T1(n = 130)

T2(n = 131)

T3(n = 130)

†P-value

Education(n) %

 Illiterate

(1)0.8

(1)0.8

(2)1.6

0.20

(1) 0.80

(1) 0.80

(2) 1.6

0.82

 Primary education

(6)4.7

(3)2.3

(5)3.9

(5) 3.9

(4)3.1

(5)3.9

 intermediate Education

(12)9.3

(6)4.6

(8)6.2

(11)8.5

(8)6.1

(7)5.4

 High school education

(4)3.1

(4)3.1

(1)0.8

(4)3.1

(3)2.3

(2)1.6

 Diploma

(43)33.3

(50)38.2

(30)23.3

(47)36.4

(41)31.3

(35)27.1

 Postgraduate education

(11)8.5

(9)6.9

(8)6.2

(10)7.8

(10)7.6

(8)6.2

 Bachelor's degree and higher

(52)40.3

(58)44.3

(75)58.1

(51)39.5

(64)48.9

(70)54.3

Job(n) %

 Housekeeper

(1)0.8

0

(1)0.8

0.20

(1)0.8

0

(1)0.8

0.32

 Labor

(75)58.1

(83)63.8

(69)53.9

(77)59.7

(77)59.2

(73)57

 Management employee

(1)0.8

(3)2.3

0

(1)0.8

(3)2.3

0

 Non- managerial employee

(24)18.6

(16)12.3

(27)21.1

(20)15.5

(20)15.4

(27)21.1

 household jobs

(14)10.9

(18)13.8

(21)16.4

(15)11.6

(20)15.4

(18)14.1

 University student

(9)7

(5)3.8

(2)1.6

(10)7.8

(4)3.1

(2)1.6

Marriage(n) %

 Married

(102)79.1

(89)67.9

(90)69.8

0.07

(95)73.6

(90)68.7

(96)74.4

0.67

 Single

(22)17.1

(32)24.4

(37)28.7

(28)21.7

(32)24.4

(31)24

 Away from spouse more than 6 month

0

(3)2.3

0

(1)0.8

(2)1.5

0

 Dead spouse

(1)0.8

(2)1.5

0

(1)0.8

(2)1.5

0

 Divorce

(4)3.1

(5)3.8

(2)1.6

(4)3.1

(5)3.8

(2)1.6

Supplementation(n) %

 Yes

(53)52

(49)41.9

(56)48.7

0.30

(55)53.9

(44)37.3

(59)51.8

0.02

 No

(49)48

(68)58.1

(59)51.3

(47)46.1

(74)62.7

(55)48.2

Income(n) %

  < 5,000,000 Rials

0

0

(1)0.9

0.60

0

0

(1)0.9

0.76

 5,000,000–10,000,000 Rials

(3)3.1

(2)1.8

(1)0.9

(3)3.1

(2)1.8

(1)0.9

 15,000,000 Rials

(4)4.2

(4)3.5

(8)7

(3)3.1

(6)5.3

(7)6.2

  > 15,000,000 Rials

(36)37.5

(35)30.7

(40)34.8

(32)32.7

(42)36.8

(37)32.7

*Age (y)

38.62 ± 8.91

36.43 ± 9.41

35.02 ± 9.00

0.00

38.21 ± 9.03

36.55 ± 9.30

35.32 ± 9.14

0.04

*BMI (kg/m2)

31.44 ± 4.30

31.53 ± 4.40

30.84 ± 4.20

0.37

31.61 ± 4.18

31.28 ± 4.43

30.93 ± 4.30

0.44

*PA (METs -min/w)

1854.97 ± 3516.16

1090.13 ± 1139.20

781.26 ± 735.11

0.00

1782.41 ± 3414.67

1236.12 ± 1636.93

768.43 ± 740.22

0.00

*Bone mineral content (BMC) (kg)

2.65 ± 0.34

2.70 ± 0.36

2.60 ± 0.33

0.08

2.67 ± 0.36

2.64 ± 0.33

2.63 ± 0.35

0.58

*Skeletal muscle mass (SMM) (kg)

25.48 ± 3.3

25.99 ± 3.65

25.15 ± 3.17

0.13

25.84 ± 3.48

25.33 ± 3.48

25.45 ± 3.29

0.45

*Weight (kg)

81.16 ± 12.89

82.92 ± 13.21

81.17 ± 12.26

0.07

82.15 ± 12.8

81.09 ± 12.96

80.28 ± 10.95

0.46

  1. PRAL1: potential renal acid load; NEAP2: net endogenous acid production; BMI: body mass index; PA: physical activity, FFM: fat free mass, BFM: body fat mass, WHR: waist to hip ratio
  2. Statistical significance was accepted at p < 0.05
  3. † Calculated by Chi-square and analysis of variance (ANOVA) for qualitative and quantitative variables, respectively
  4. *Mean ± SD