Table 2. Mean differences in cardiometabolic risk factors by total time in bed categories controlling for age.
| Total Time in Bed | |||||
|---|---|---|---|---|---|
| < P25 | P 25–75 | >P75 | p | Bonferroni Post-hoc | |
| Total simple (n = 146) | n = 36 | n = 73 | n = 37 | ||
| WC (cm) | 72.22 (11.47) | 66.03 (8.48) | 66.91 (9.40) | 0.014 | 1>2 |
| Log TG/HDL-c (mg/dL) | 0.15 (0.29) | -0.02 (0.23)b | -0.03 (0.26) | 0.006 | 1>2;1>3 |
| Log insulin (mg/dL) | 0.93 (0.21) | 0.81 (0.26)b | 0.86 (0.17) | 0.064 | |
| MAP (mmHg) | 78.18 (5.62) | 73.98 (6.45) | 75.80 (7.83) | 0.023 | (1>2) |
| CMRI | 1.00 (1.83) | -0.29 (1.64)b | -0.06 (1.65) | 0.002 | 1>2;1>3 |
| Boys (n = 66) | n = 22 | n = 29 | n = 15 | ||
| WC (cm) | 74.76 (12.63) | 65.24 (8.39) | 67.28 (10.94) | 0.036 | 1>2 |
| Log TG/HDL-c (mg/dL) | 0.18 (0.33) | -0.08 (0.21) | -0.13 (0.17) | 0.001 | 1>2;1>3 |
| Log insulin (mg/dL) | 0.94 (0.23) | 0.74 (0.24) | 0.83 (0.15) | 0.018 | 1>2 |
| MAP (mmHg) | 79.08 (5.93) | 75.54 (5.47) | 75.80 (8.03) | 0.286 | |
| CMRI | 1.31 (2.06) | -0.33 (1.46) | -0.22 (1.57) | 0.004 | 1>2;1>3 |
| Girls (n = 80) | n = 14 | n = 44 | n = 22 | ||
| WC (cm) | 68.23 (8.28) | 66.55 (8.60) | 66.65 (8.46) | 0.800 | |
| Log TG/HDL-c (mg/dL) | 0.09 (0.21) | 0.02 (0.23)c | 0.04 (0.30) | 0.661 | |
| Log insulin (mg/dL) | 0.91 (0.17) | 0.85 (0.26)c | 0.88 (0.17) | 0.716 | |
| MAP (mmHg) | 76.76 (4.98) | 72.95 (6.89) | 75.80 (7.88) | 0.132 | |
| CMRI | 0.52 (1.33) | -0.27 (1.77)c | 0.05 (1.72) | 0.321 | |
Data are presented by mean (SD).
Abbreviations: WC, waist circumference; log TG/HDL-c, logarithm of triglycerides/high density lipoprotein cholesterol; log insulin, logarithm of fasting insulin; MAP, Mean Arterial Pressure; CMRI, Cardiometabolic Risk Index.
Categories of Total Time in Bed represent the 1st, 2nd and 3rd (2), and 4th quartiles. Bonferroni post-hoc test was used in all the pairwise mean comparisons statistically significant as shown in boldface type (p<0.05).
b n = 72.
c n = 43.