Table 2.
Comparison of bariatric-surgery group vs. control group during summer season (April to September)
| Mean ± sd (range) |
P value | ||
|---|---|---|---|
| Bariatric surgery, n = 33 | Control, n = 35 | ||
| Age (yr) | 44 ± 9 (25–59) | 39.4 ± 7 (26–49) | 0.036 |
| Height (cm) | 163 ± 6 (150–173) | 164 ± 5 (153–174) | 0.214 |
| Weight (kg) | 138.0 ± 35.7 (91.8–230.9) | 73.8 ± 16.2 (45.0–114.1) | <0.0001 |
| BMI (kg/m2) | 51.9 ± 12.8 (35.0–90.2) | 27.3 ± 6.0 (16.7–41.2) | <0.0001 |
| s25D (ng/ml) | 17 ± 9 (4.3–41.5) | 26 ± 10 (8.0–58.4)a | <0.0001 |
| sPTH (pg/ml) | 43.6 ± 36.9 (11.5–215.0) | 26.6 ± 9.7 (11.1–54.1) | 0.011 |
| s1,25D (pg/ml) | 37 ± 17 (16–89) | 24 ± 17 (5–73) | 0.003 |
| sBAP (ng/ml) | 19 ± 5 (10.6–27.6) | 11 ± 3 (5.4–17.1) | <0.0001 |
| sNTX (nm bone collagen equivalents) | 10.1 ± 3.4 (3.3–22.1) | 8.2 ± 2.8 (4.5–15.6) | 0.011 |
| sCa (mg/dl) | 8.89 ± 0.41 (8.0–9.6) | 8.79 ± 0.37 (8.1–9.4) | 0.31 |
| sPi (mg/dl) | 3.52 ± 0.51 (2.4–4.7) | 3.24 ± 0.48 (2.3–4.1) | 0.026 |
| sCr (mg/dl) | 1.07 ± 0.26 (0.7–1.9) | 0.85 ± 0.11 (0.7–1.1) | <0.0001 |
a
Significantly different by season, P = 0.01.