Table 1 Demographic and baseline characteristics for control and OSA groups (n = 150).
From: Obstructive sleep apnoea syndrome (OSAS) as a risk factor for secondary osteoporosis in children
Variables | Control (n = 64) | OSA (n = 86) | p |
|---|---|---|---|
Age (mean, SD) | 12.98 (2.119) | 12.90 (2.052) | 0.796* |
Gender | |||
Female | 23 (35.9) | 19 (22.1) | 0.062# |
Male | 41 (64.1) | 67 (77.9) | |
Ethnicity | |||
Chinese | 6 (9.4) | 7 (8.1) | 0.664# |
Indian | 17 (26.5) | 18 (20.9) | |
Malay | 41 (64.1) | 61 (70.9) | |
BMI | |||
Underweight | 6 (9.4) | < 0.001# | |
Normal | 42 (65.6) | 10 (11.6) | |
Overweight/obese | 16 (25) | 76 (88.4) | |
Vitamin D (nmol/ml) | 50.03 (12.20) | 46.59 (9.75) | 0.066* |
Serum calcium (mg/dL) | 2.38 (0.13) | 2.38 (0.15) | 0.860* |
Serum phosphate (mmol/L) | 1.50 (0.18) | 1.56 (0.16) | 0.039* |
Serum alkaline phosphatase (µ/L) | 216.78 (58.59) | 176.84 (57.31) | < 0.001* |
Physical activity (PAQ-C/A) | |||
Low (score 1) | 39 (60.9) | 64 (74.4) | 0.078# |
High (score 5) | 25 (39.1) | 22 (25.6) | |
Calcium intake (mg/day) (FFQ), mean (SD) | 1029.06 (117.98) | 1029.88 (149.19) | 0.971* |
