Table 2 Demographic and clinical indicators of participants[mean ± SD].
From: Association between vitamin C in serum and trouble sleeping based on NHANES 2017–2018
Variables | Overall | No trouble sleeping | Trouble sleeping | t value | P value |
|---|---|---|---|---|---|
Age | 51.05 ± 17.29 | 49.59 ± 17.58 | 54.70 ± 16.01 | − 7.995 | < 0.001 |
Weight | 82.67 ± 21.79 | 80.92 ± 20.59 | 86.95 ± 23.94 | − 6.752 | < 0.001 |
Height | 166.73 ± 10.09 | 166.84 ± 10.12 | 166.48 ± 10.01 | 0.923 | 0.356 |
Body mass index | 29.62 ± 6.88 | 28.94 ± 6.38 | 31.27 ± 7.73 | − 8.132 | < 0.001 |
Upper leg length | 39.10 ± 3.85 | 39.29 ± 3.85 | 38.63 ± 3.79 | 4.401 | < 0.001 |
Upper arm length | 37.40 ± 2.85 | 37.32 ± 2.86 | 37.59 ± 2.83 | − 2.454 | 0.014 |
Arm Circumference | 33.41 ± 5.14 | 33.04 ± 4.92 | 34.31 ± 5.53 | − 6.129 | < 0.001 |
Waist Circumference | 100.58 ± 16.67 | 98.77 ± 15.91 | 104.99 ± 17.64 | − 9.349 | < 0.001 |
Total cholesterol | 4.90 ± 1.07 | 4.89 ± 1.05 | 4.91 ± 1.13 | − 0.570 | 0.568 |
HDL-C | 1.38 ± 0.40 | 1.38 ± 0.39 | 1.37 ± 0.42 | 1.051 | 0.293 |
Ferritin | 159.17 ± 195.85 | 155.38 ± 170.36 | 168.41 ± 247.12 | − 1.717 | 0.086 |
HS-CRP | 3.83 ± 6.94 | 3.52 ± 6.30 | 4.58 ± 8.24 | − 3.515 | < 0.001 |
Glycohemoglobin | 5.82 ± 1.03 | 5.78 ± 0.99 | 5.93 ± 1.12 | − 3.445 | < 0.001 |
Vitamin C | 0.90 ± 0.49 | 0.92 ± 0.47 | 0.86 ± 0.53 | 2.800 | 0.005 |
Transferrin receptor | 39.69 ± 23.10 | 39.84 ± 25.10 | 39.34 ± 17.27 | 0.561 | 0.575 |
Alpha-carotene | 5.42 ± 9.27 | 5.76 ± 10.10 | 4.59 ± 6.73 | 3.843 | < 0.001 |
Cis-beta-carotene | 1.19 ± 1.39 | 1.24 ± 1.45 | 1.07 ± 1.23 | 3.293 | 0.001 |
Gamma-tocopherol | 182.86 ± 99.29 | 178.02 ± 92.38 | 194.69 ± 113.59 | − 3.986 | < 0.001 |
Total lycopene | 38.96 ± 19.53 | 39.49 ± 19.69 | 37.65 ± 19.08 | 2.421 | 0.016 |
Retinol | 52.93 ± 16.27 | 52.08 ± 15.41 | 55.03 ± 18.04 | − 4.397 | < 0.001 |
Alpha-tocopherol | 1255.48 ± 461.92 | 1238.60 ± 440.63 | 1296.68 ± 508.05 | − 3.061 | 0.002 |
