Introduction
Methods
Survey population
Dietary intake assessment
Anthropometric measurements
Blood samples
Physical activity
Statistical analysis
Results
Total | Males | Females | |
---|---|---|---|
Total participants (n) | 1804 | 855 | 949 |
Age (y) (mean (range)) | 14.7 (12.5-17.4) | 14.8 (12.5-17.4) | 14.7 (12.5-17.4) |
12.5-14.9 y (n) | 1032 | 481 | 551 |
15.0-17.5 y (n) | 772 | 374 | 398 |
Tanner Stage (n = 1752) | n (%) | ||
Tanner 1 | 9 (0.514) | 9 (1.1) | 0 (0.0) |
Tanner 2-4 | 1294 (73.9) | 614 (74.2) | 680 (73.5) |
Tanner 5 | 449 (25.6) | 204 (24.7) | 245 (26.5) |
Weight status (n = 1804)μ | |||
Underweight | 142 (7.9) | 58 (6.8) | 84 (8.9) |
Normal weight | 1383 (76.7) | 649 (75.9) | 734 (77.3) |
Overweight | 222 (12.3) | 114 (13.3) | 108 (11.4) |
Obesity | 57 (3.2) | 34 (4.0) | 23 (2.4) |
Mean (SD) | |||
Anthropometry | |||
BMI z-score (n = 1804) | 0.270 (1.1) | 0.358 (1.1) | 0.190 (1.0) |
BF% (n = 1764) | 22.0 (8.6) | 18.4 (9.1) | 25.1 (6.8) |
Biomarkers | |||
TC (mg/dL) (n = 552) | 159.1 (27) | 151.9 (24.9) | 165.8 (27.1) |
TG (mg/dL) (n = 552) | 67.6 (31.1) | 64.5 (31.5) | 70.5 (30.5) |
LDL-C (mg/dL) (n = 552) | 92.6 (24.2) | 89.0 (23.2) | 96.0 (24.7) |
VLDL-C (mg/dL) (n = 552) | 13.5 (6.2) | 12.9 (6.3) | 14.1 (6.1) |
HDL-C (mg/dL) (n = 552) | 55.6 (10.3) | 53.3 (9.3) | 57.8 (10.7) |
CRP (mg/L) (n = 524) | 1.2 (4.0) | 1.5 (5.5) | 0.841 (1.3) |
Glucose (mg/dL) (n = 552) | 90.1 (7.0) | 91.9 (7.2) | 88.5 (6.4) |
Insulin (μlU/mL) (n = 545) | 9.5 (6.0) | 9.0 (6.6) | 10.0 (6.6) |
Leptin (ng/mL) (n = 518) | 18.5 (21.9) | 8.1 (12.9) | 27.5 (24.1) |
Total energy and total, animal and plant protein intakes
Characteristics | N | Total protein (g/d) | Total protein (g/(kg.d)) | The number of subjects below the recommendations | |||||
---|---|---|---|---|---|---|---|---|---|
25% | 50% | 75% | 25% | 50% | 75% | EAR
μ | PRI
μ | ||
Total | 1804 | 76 | 91 | 109 | 1.3 | 1.6 | 2.0 | 1 | 2 |
Gender | |||||||||
Males | 855 | 90 | 106 | 127 | 1.5 | 1.8 | 2.3 | 0 | 0 |
Females | 949 | 68 | 80 | 94 | 1.2 | 1.5 | 1.8 | 1 | 2 |
Age | |||||||||
12.5-14.9 y | 1032 | 74 | 90 | 108 | 1.4 | 1.7 | 2.1 | 1 | 1 |
15.0-17.5 y | 772 | 77 | 94 | 112 | 1.3 | 1.6 | 1.9 | 0 | 1 |
Characteristics | N | Energy (kcal/d) | Total protein (g/d) | Total protein (g/(kg.d)) | Animal protein (g/d) | Plant protein (g/d) | Total protein | Plant protein |
---|---|---|---|---|---|---|---|---|
% energy contributing to total energy intake | ||||||||
Mean intake (SD) | ||||||||
Total | 1804 | 2450 (637) | 96 (28) | 1.7 (0.6) | 58 (23) | 38 (13) | 15.8 (2.8) | 6.2 (1.3) |
Gender | ||||||||
Males | 855 | 2792 (655) | 110 (29) | 1.9 (0.6) | 66 (24) | 43 (13) | 15.9 (3.0) | 6.2 (1.3) |
Females | 949 | 2141 (428)* | 83 (20)* | 1.6 (0.5)* | 50 (18)* | 33 (10)* | 15.6 (2.7) | 6.3 (1.3) |
Age | ||||||||
12.5-14.9 y | 1032 | 2358 (637) | 94 (28) | 1.8 (0.6) | 57 (22) | 37 (12) | 16.1 (2.9) | 6.2 (1.4) |
15.0-17.5 y | 772 | 2752 (713)** | 98 (29)** | 1.6 (0.5)** | 58 (23) | 39 (12)** | 15.4 (2.8)** | 6.2 (1.2) |
Weight status | ||||||||
Underweight | 142 | 2443 (631) | 94 (28) | 2.2 (0.7) | 56 (21) | 39 (12) | 15.5 (2.7) | 6.3 (1.2) |
Normal weight | 1383 | 2458 (635) | 96 (28)a | 1.8 (0.6)a | 58 (22) | 38 (13) | 15.7 (2.8) | 6.2 (1.3) |
Overweight | 222 | 2397 (636) | 96 (29)ab | 1.4 (0.4)ab | 59 (24) | 37 (11) | 16.2 (3.0)b | 6.2 (1.3) |
Obesity | 57 | 2476 (701) | 102 (33)abc | 1.2 (0.4)ab | 63 (27) | 38 (12) | 16.5 (3.1)b | 6.2 (1.2) |
Associations between total, animal and plant protein intakes and cardio-metabolic indicators
Dependent variables
μ | Animal protein (g/d) | Plant protein (g/d) | ||||||
---|---|---|---|---|---|---|---|---|
β | SE | 95% CI |
P
| β | SE | 95% CI |
P
| |
BMI z-score | ||||||||
Model 1 | 0.001 | 0.001 | -0.001, 0.004 | 0.206 | -0.002 | 0.002 | -0.006, 0.002 | 0.414 |
Model 2 | 0.003 | 0.001 | 0.000, 0.006 | 0.023 | 0.000 | 0.002 | -0.005, 0.004 | 0.847 |
Model 3 | -0.000002 | 0.000001 | -0.000007, 0.000 | 0.421 | -0.012 | 0.005 | -0.023, -0.001 | 0.027 |
Body fat (%) | ||||||||
Model 1 | -0.054 | 0.009 | -0.071, -0.036 | <0.001 | -0.162 | 0.016 | -0.194, -0.131 | <0.001 |
Model 2 | -0.009 | 0.010 | -0.030, 0.011 | 0.386 | -0.106 | 0.019 | -0.144, -0.069 | <0.001 |
Model 3 | -0.000052 | 0.000018 | -0.000087, - 0.000016 | 0.004 | -0.139 | 0.040 | -0.217, -0.060 | 0.001 |
Animal protein (E%)
|
Plant protein (E%)
| |||||||
BMI z-score | ||||||||
Model 1 | 0.021 | 0.008 | 0.005, 0.038 | 0.011 | 0.012 | 0.019 | -0.026, 0.050 | 0.533 |
Model 2 | 0.021 | 0.008 | 0.005, 0.037 | 0.011 | 0.008 | 0.020 | -0.031, 0.046 | 0.692 |
Model 3 | 0.024 | 0.009 | 0.006, 0.043 | 0.010 | -0.027 | 0.021 | -0.067, 0.013 | 0.188 |
Body fat (%) | ||||||||
Model 1 | 0.209 | 0.067 | 0.077, 0.341 | 0.002 | 0.124 | 0.156 | -0.181, 0.429 | 0.426 |
Model 2 | 0.196 | 0.065 | 0.068, 0.325 | 0.003 | -0.179 | 0.154 | -0.482, 0.123 | 0.245 |
Model 3 | 0.168 | 0.070 | 0.030, 0.305 | 0.017 | -0.229 | 0.151 | -0.526, 0.068 | 0.130 |