Table 5.
Mean trends in nutritional variables through 24-month follow-up
| Preoperative, mean (±SE) 95% CI | 1 month, mean (±SE) 95% CI | 3 month, mean (±SE) 95% CI | 6 month, mean (±SE) 95% CI | 9 month, mean (±SE) 95% CI | 12 month, mean (±SE) 95% CI | 18 month, mean (±SE) 95% CI | 24 month, mean (±SE) 95% CI | |
|---|---|---|---|---|---|---|---|---|
| Ferritin, ng/mL (n = 294) | 57.9 (2.5) | 50.9 (2.3) | 50.2 (2.2) | 49.3 (2.2) | 49.2 (2.3) | 49.0 (2.3) | 48.8 (2.4) | 49.1 (2.3) |
| 52.9, 62.9 | 46.4, 55.5 | 45.7, 54.6 | 44.9, 53.7 | 44.7, 53.6 | 44.4, 53.6 | 44.0, 53.5 | 44.6, 53.7 | |
| Parathormone, pg/mL (n = 318) | 50.1 (1.6) | 50.3 (1.3) | 49.4 (1.2) | 47.4 (1.3) | 49.0 (0.9) | 48.5 (0.9) | 48.7 (0.9) | 50.7 (1.1) |
| 46.8, 53.3 | 47.7, 52.9 | 47.1, 51.7 | 44.9, 50.0 | 47.2, 50.9 | 46.8, 50.2 | 46.9, 50.5 | 48.5, 52.9 | |
| Vitamin D, ng/mL (n = 252) | 16.0 (0.6) | 20.2 (0.5) | 24.1 (0.5) | 25.7 (0.5) | 26.2 (0.4) | 25.8 (0.3) | 25.9 (0.3) | 25.2 (0.3) |
| 14.9, 17.2 | 19.2, 21.1 | 23.1, 25.1 | 24.8, 26.6 | 25.4, 27.0 | 25.1, 26.4 | 25.2, 26.5 | 24.5, 25.8 | |
| Vitamin B12, ng/mL (n = 294) | 420.9 (13.8) | 381.8 (12.0) | 345.7 (9.1) | 340.3 (8.3) | 346.0 (7.5) | 358.9 (8.2) | 376.1 (7.9) | 396.4 (7.6) |
| 393.7, 448.2 | 358.1, 405.4 | 327.7, 363.8 | 323.9, 356.6 | 331.3, 360.7 | 342.8, 375.0 | 360.5, 391.8 | 381.6, 411.3 | |
| Calcium, mmol/L (n = 200) | 9.15 (0.04) | 9.37 (0.03) | 9.43 (0.03) | 9.45 (0.03) | 9.43 (0.03) | 9.45 (0.02) | 9.44 (0.03) | 9.42 (0.03) |
| 9.10, 9.24 | 9.30, 9.43 | 9.37, 9.49 | 9.39, 9.50 | 9.37, 9.48 | 9.40, 9.50 | 9.39, 9.48 | 9.37, 9.47 | |
| Albumin, g/L (n = 234) | 4.22 (0.03) | 4.26 (0.03) | 4.29 (0.03) | 4.47 (0.15) | 4.36 (0.02) | 4.34 (0.02) | 4.35 (0.02) | 4.31 (0.02) |
| 4.16, 4.28 | 4.21, 4.32 | 4.23, 4.34 | 4.18, 4.76 | 4.32, 4.40 | 4.29, 4.38 | 4.31, 4.39 | 4.27, 4.35 |
Normal reference ranges: hemoglobin, 10.6–15.0 gm/dL; ferritin, 30.0–400 ng/mL; parathormone 15–65 pg/mL; vitamin D: 9.5–55.5 ng/mL; vitamin B12, 191–663 pg/mL; calcium, 8.6–10.0 mg/dL; albumin: 3.5–5.2 g/dL. SE, standard error for estimated marginal means based upon repeated measures ANOVA; n, number of patients with complete data across all time points relative to nutrition parameter assessed.