Table 3.
Clinical and demographic predictors of nutrient levels*
| Ferritin (log) | Transferrin | Vitamin B12 (log) | Folate | Vitamin A | Vitamin D | PTH (log) | |
|---|---|---|---|---|---|---|---|
| Surgery type: | |||||||
| Gastric Bypass | −0.26 (0.08) | 17.2 (4.28) | −0.28 (0.06) | −0.06 (0.49) | −26.9 (10.4) | 0.18 (0.86) | 0.24 (0.04) |
| Sleeve Gastrectomy | 0 p=0.002 |
0 p<0.0001 |
0 p<0.0001 |
0 p=0.89 |
0 p=0.01 |
0 p=0.83 |
0 p<0.0001 |
| Visit: | |||||||
| Year 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Year 2 | −0.26 (0.10) | 6.76 (5.13) | −0.04 (0.07) | 0.47 (0.59) | −10.3 (13.2) | −0.06 (1.08) | 0.02 (0.05) |
| Year 3 | −0.53 (0.10) | 21..2 (5.32) | −0.03 (0.07) | 1.18 (0.61) | −14.4 (13.6) | 0.38 (1.12) | 0.02 (0.05) |
| Year 4 | −0.62 (0.11) | 30.0 (5.40) | −0.10 (0.07) | 2.06 (0.62) | −26.9 (13.7) | 0.11 (1.13) | 0.07 (0.05) |
| Year 5 | −0.69 (0.11) p<0.0001 |
34.1 (5.45) p<0.0001 |
−0.03 (0.07) p=0.74 |
2.54 (0.62) p<0.0001 |
−15.7 (13.9) p=0.40 |
0.31 (1.14) p=0.99 |
0.12 (0.05) p=0.13 |
| Sex: | |||||||
| Female | −0.62 (0.07) | 24.9 (3.64) | 0.003 (0.05) | 1.00 (0.42) | 5.46 (9.24) | 1.89 (0.76) | 0.01 (0.04) |
| Male (reference) | 0 p<0.0001 |
0 p<0.0001 |
0 p=0.95 |
0 p=0.02 |
0 p=0.55 |
0 p=0.01 |
0 p=0.70 |
| Race: | |||||||
| Black | 0.19 (0.08) | −15.3 (3.95) | 0.03 (0.05) | −0.94 (0.45) | −35.5 (10.0) | −5.02 (0.84) | 0.13 (0.04) |
| Other | 0.22 (0.13) | −14.6 (6.77) | 0.13 (0.09) | −1.54 (0.80) | 1.47 (17.0) | −3.26 (1.44) | 0.04 (0.07) |
| White (reference) | 0 p=0.02 |
0 P=0.0002 |
0 p=0.37 |
0 p=0.03 |
0 P=0.002 |
0 p<0.0001 |
0 P=0.001 |
| Education: | |||||||
| HS graduate | 0.17 (0.12) | 1.49 (5.90) | 0.12 (0.08) | 0.05 (0.67) | 19.4 (15.0) | −0.94 (1.23) | −0.04 (0.06) |
| College | −0.01 (0.12) | 8.12 (5.86) | 0.14 (0.08) | −0.07 (0.67) | 6.73 (14.8) | −0.58 (1.22) | 0.004 (0.06) |
| College graduate | 0.18 (0.13) | 1.58 (6.43) | 0.13 (0.09) | 0.51 (0.74) | 26.5 (16.2) | −0.88 (1.34) | −0.05 (0.06) |
| <High school (reference) | 0 p=0.04 |
0 p=0.23 |
0 p=0.35 |
0 p=0.72 |
0 p=0.19 |
0 p=0.87 |
0 p=0.54 |
| Weight change (+5 kg/y) | −0.03 (0.01) p=0.04 |
2.42 (0.71) p=0.0007 |
0.009 (0.01) p=0.37 |
0.32 (0.08) p=0.0001 |
5.17 (1.81) p=0.004 |
−0.47 (0.15) p=0.002 |
0.02 (0.01) p=0.02 |
| Acid suppression | −0.03 (0.10) p=0.74 |
2.14 (5.00) p=0.67 |
−0.002 (0.07) p=0.98 |
NA | NA | NA | NA |
| hsCRP | 0.31 (0.05) p<0.0001 |
−9.45 (2.50) p=0.0002 |
NA | NA | NA | NA | NA |
| Multivitamin supplements/wk: | |||||||
| <7 | |||||||
| 7-14 | −0.07 (0.09) | 1.97 (4.44) | 0.008 (0.07) | 1.41 (0.51) | −8.85 (11.3) | 3.26 (0.98) | −0.02 (0.05) |
| 14+ | −0.07 (0.08) | −1.26 (3.89) | 0.10 (0.06) | 2.35 (0.45) | 6.77 (9.95) | 4.00 (0.90) | −0.06 (0.05) |
| 0 (reference) | 0.22 (0.10) 0 p=0.05 |
−2.39 (5.26) 0 p=0.85 |
0.26 (0.07) 0 p=0.003 |
2.57 (0.60) 0 p<0.0001 |
34.4 (13.3) 0 p=0.02 |
5.47 (1.15) 0 p<0.0001 |
−0.09 (0.06) 0 p=0.43 |
| Vitamin D supplements/wk: | NA | NA | NA | NA | NA | ||
| <7 | 1.17 (1.02) | −0.10 (0.05) | |||||
| 7+ | 4.51 (0.95) | 0.005 (0.05) | |||||
| 0 (reference) | 0 p<0.0001 |
0 p=0.12 |
|||||
| Vitamin B12 supplements/wk: | NA | NA | NA | NA | NA | NA | |
| <7 | |||||||
| 7+ | 0.07 (0.07) | ||||||
| 0 (reference) | 0.30 (0.07) 0 p<0.0001 |
||||||
| Calcium supplements/wk: | NA | NA | NA | NA | NA | ||
| <7 | −0.07 (0.06) | ||||||
| 7-14 | 0.02 (0.05) | ||||||
| 14+ | 0.01 (0.05) | ||||||
| 0 (reference) | 0 p=0.53 |
*
Nutrient level is modelled as either raw or log value showing beta estimate (standard error). P-values reflect test for overall significance of each variable.