Records of a result indicating a deficiency
| Variable | 2–3 years post-surgery | 3–4 years post-surgery | 4–5 years post-surgery | ||||||
|---|---|---|---|---|---|---|---|---|---|
| LAGB n/N a (%) | Gastric bypass n/N (%) | Sleeve gastrectomy n/N (%) | LAGB n/N (%) | Gastric bypass n/N (%) | Sleeve gastrectomy n/N (%) | LAGB n/N (%) | Gastric bypass n/N (%) | Sleeve gastrectomy n/N (%) | |
| Folate (AHD <3.1 microgram/L) | 15/192 (7.8) | 12/361 (3.3) | 7/98 (7.1) | 11/158 (6.9) | 13/257 (5.1) | 6/67 (9.0) | 16/157 (10.2) | 3/173 (1.7) | 2/55 (3.6) |
| Calcium (AHD <2.2 mmol/L) | 22/262 (8.4) | 53/325 (16.3) | 11/92 (12.0) | 25/213 (11.7) | 33/238 (13.9) | 6/77 (7.8) | 23/200 (11.5) | 26/172 (15.1) | 7/51 (13.7) |
| Anaemia (AHD <133 (male)/110 (female) g/L) | 283/623 (45.4) | 327/646 (50.6) | 89/220 (40.5) | 277/548 (50.6) | 247/496 (50.0) | 75/162 (46.3) | 233/498 (46.8) | 162/325 (49.9) | 46/110 (41.8) |
| Ferritin (AHD <15 microgram/L) | 32/169 (18.9) | 89/347 (25.7) | 20/95 (21.1) | 48/137 (35.0) | 69/224 (30.8) | 22/72 (30.6) | 43/153 (28.1) | 57/163 (35.0) | 18/61 (29.5) |
| Protein (AHD <60 g/L) | 7/415 (1.7) | 11/372 (3.0) | 2/125 (1.6) | 5/339 (1.5) | 6/276 (2.2) | 1/96 (1.0) | 4/320 (1.3) | 7/188 (3.7) | 0/61 (0.0) |
| Vitamin B12 (AHD <187 ng/L) | 22/190 (11.6) | 52/360 (14.4) | 14/99 (14.1) | 20/154 (13.0) | 40/280 (14.3) | 6/68 (8.8) | 16/156 (10.3) | 25/186 (13.4) | 4/52 (7.7) |
| Parathyroid hormone (AHD >7.2 pmol/L) | 1/6 (16.7) | 15/51 (29.4) | 0/7 (0.0) | 1/6 (16.7) | 11/29 (37.9) | 3/6 (50.0) | 2/5 (40.0) | 7/13 (53.9) | 2/8 (25.0) |
↵a N is the total number of patients with a record of a given nutritional blood test measurement. n is the number of patients with a record of a given nutritional blood test measurement for whom the result indicated a deficiency in that nutrient. Only those with a recorded blood test result were included in these analyses AHD = additional health data.
LAGB = laparoscopic adjustable gastric banding.