Table 2 Dietary and Weekly nutrient intake in “Frail”, “Pre-frail” and “Robust” groups

Staple food(g/d)

419.88±90.40

446.85±91.59

378.74±93.50

6.069

0.002

Vegetarian dishes(g/w)

 Leafy vegetables

607.22±61.65

666.51±69.38

763.78±66.03

8.422

＜0.001

 Root and stem vegetables

389.76±80.69

374.43±81.30

427.00±81.46

2.721

0.066

 Solanaceous fruit vegetables

360.13±70.46

370.02±76.23

411.68±79.59

2.494

0.083

 Melon vegetables

325.41±62.31

314.81±56.05

396.75±69.21

12.428

0.002

 Legume vegetables

328.70±62.14

284.51±62.45

356.45±66.95

5.472

0.004

Meat dishes(g/w)

 Livestock

324.12±58.18

333.53±40.04

404.68±44.43

13.511

0.001

 Poultry

153.27±41.68

136.08±40.88

155.57±58.55

2.131

0.119

 Fish and shrimp

140.59±41.19

144.04±48.86

186.96±44.81

6.991

0.001

 Eggs

220.38±58.50

223.34±55.82

255.78±56.66

4.526

0.011

Between-meal nibbles(g/w)

 Fruits

121.09±416.67

425.50±162.01

645.49±114.01

39.051

＜0.001

 Milk

382.28±57.56

447.93±53.14

566.53±46.12

9.162

0.010

 Nuts

90.53±43.22

111.16±43.67

121.43±43.20

2.667

0.263

Daily water intake(ml/d)

1199.75±244.49

1332.59±240.71

1351.78±293.12

3.485

0.031

 Energy(Kcal)

13503.25±3388.5

14307.55±3933.78

13392.04±3296.52

1.723

0.423

 Protein(g)

386.38±96.99

398.37±82.51

407.20±91.56

3.149

0.207

 Fat(g)

239.45±97.02

257.48±95.80

289.93±95.67

4.464

0.012

 Carbohydrate(g)

2522.79±500.14

2676.27±513.35

2364.07±588.46

2.62

0.270

 Dietary fiber(g)

76.77±25.45

76.33±24.27

86.83±27.67

6.07

0.002

Vitamins

 VA(ug)

191.46±60.59

213.68±86.44

264.39±80.37

21.958

＜0.001

 VB(mg)

72.11±26.40

72.29±25.02

77.77±25.09

2.859

0.058

 VC(mg)

573.01±147.09

601.88±150.76

702.60±176.31

10.911

＜0.001

 VE(mg)

45.23±18.45

46.22±21.77

54.26±17.91

4.279

0.014

Macroelements

 Ca(mg)

1533.11±378.35

1590.67±332.18

1882.12±396.75

12.389

＜0.001

 P(mg)

4462.63±951.69

4673.39±922.61

4846.94±958.38

4.857

0.088

 K(mg)

8273.10±1246.13

8461.19±1212.12

9151.05±1289.69

5.203

0.006

 Na(mg)

1831.90±520.97

2057.07±636.63

2318.20±588.43

3.145

0.043

 Mg(mg)

1421.78±479.25

1488.83±523.92

1500.84±473.54

2.697

0.260

Microelements

 Fe(mg)

30.61±17.28

32.00±19.03

35.51±21.20

4.839

0.008

 Zn(mg)

73.63±30.44

78.69±33.86

74.34±37.52

2.064

0.356

 Se(ug)

222.93±104.51

231.06±109.43

231.19±93.03

1.071

0.585

 Cu(mg)

8.83±5.32

9.53±5.91

8.74±5.36

3.076

0.215

 Mn(mg)

45.24±31.21

49.80±35.23

45.74±36.49

2.449

0.294

Food water content(g)

3489.11±1571.61

3588.13±1584.71

4240.09±1762.38

19.943

＜0.001

Oil(g)

 ≤25

39(23.49)

131(24.95)

101(28.61)

5.618

0.467

 25~50

88(53.01)

242(46.10)

152(43.06)

 ＞50

27(16.27)

111(21.14)

71(20.11)

 Unclear

12(7.23)

41(7.81)

29(8.22)

Salt(g)

 ＜6

78(46.99)

231(44.00)

164(46.46)

3.951

0.683

 6~10

64(38.55)

210(40.00)

145(41.08)

 ＞10

18(10.84)

71(13.52)

38(10.76)

 Unclear

6(3.61)

13(2.48)

6(1.70)

Sugar(g)

 ≤25

111(66.87)

344(65.52)

249(70.54)

7.423

0.284

 25~50

42(25.30)

121(23.05)

66(18.70)

 ＞50

8(4.82)

45(8.57)

24(6.80)

 Unclear

5(3.01)

14(2.67)

14(3.97)

Spices

 Not eat

22(13.25)

62(11.81)

32(9.07)

12.975

0.043

 Eat less

50(30.12)

148(28.19)

92(26.06)

 Eat an average

60(36.14)

214(40.76)

128(36.26)

 Eat more

34(20.48)

101(19.24)

101(28.61)