Table 1 Subjects’ characteristics at baseline
From: Effect of a mattress on lumbar spine alignment in supine position in healthy subjects: an MRI study
Total (n = 20) | Females (n = 10) | Males (n = 10) | p values | |
|---|---|---|---|---|
Age (years) | 32.3 ± 6.5 | 31.8 ± 6.7 | 32.7 ± 6.6 | 0.767 |
Height (cm) | 172.2 ± 8.0 | 167.6 ± 6.0 | 176.8 ± 7.0 | 0.003 |
Body mass (kg) | 66.8 ± 11.4 | 58.8 ± 5.9 | 74.7 ± 9.9 | < 0.001 |
BMI (kg/m2) | 22.4 ± 2.9 | 20.9 ± 1.4 | 23.9 ± 3.4 | 0.021 |
L1–L5 (degrees) | 45.2 ± 8.6 | 46.0 ± 9.2 | 44.4 ± 8.4 | 0.677 |
L1–S1 (degrees) | 56.4 ± 8.5 | 57.6 ± 7.4 | 55.3 ± 9.7 | 0.248 |
SS (degrees) | 36.9 ± 8.6 | 38.3 ± 10.6 | 35.6 ± 6.4 | 0.166 |
PI (degrees) | 48.4 ± 9.6 | 47.0 ± 11.8 | 49.8 ± 7.3 | 0.525 |