Table 6.
Risk factors identification of symptoms in patients with serum Ca below normal range
| B+S- | B+S+ | Univariate | Multivariate | |||
|---|---|---|---|---|---|---|
| Frequency/% | Frequency/% | P | P | OR (95% CI) | ||
| Sex | Male | 2/3.7 | 4/7.4 | 0.674 | 0.307 | – |
| Female | 35/18.6 | 33/17.6 | ||||
| Age | <55 | 33/16.1 | 32/15.6 | 1.000 | – | – |
| ≥55 | 4/10.8 | 5/13.5 | ||||
| Pre-Ca/mmol·L−1 | 2.00–2.34 | 22/20.4 | 23/21.3 | 0.812 | 0.879 | – |
| 2.34–2.60 | 15/11.2 | 14/10.4 | ||||
| Extent of surgery | Unilateral | 1/4.2 | 0/0 | 1.000 | 0.460 | – |
| Bilateral | 36/16.5 | 37/17.0 | ||||
| CND | Unilateral | 9/15.8 | 3/5.3 | 0.058 | – | – |
| Bilateral | 28/15.1 | 34/18.4 | ||||
| LND | No | 30/15.8 | 16/8.4 | 0.001 | 0.001 | 5.625(1.971, 16.054) |
| Yes | 7/13.5 | 21/40.4 | ||||
| VD deficiency | No | 24/15.5 | 21/13.5 | 0.475 | – | – |
| Yes | 13/14.9 | 16/18.4 | ||||
| Hypoparathyroidism | No | 13/10.9 | 5/4.2 | 0.030 | 0.054 | – |
| Yes | 24/26.0 | 32/26.0 | ||||
| Parathyroid number | No | 5/9.6 | 10/19.2 | 0.148 | – | – |
| Yes | 32/16.8 | 27/14.2 | ||||
| Auto-T | No | 22/12.0 | 27/14.8 | 0.219 | – | – |
| Yes | 15/25.4 | 10/16.9 | ||||
| Hypomagnesemia | No | 29/14.9 | 22/11.3 | 0.079 | 0.223 | – |
| Yes | 8/16.7 | 15/31.3 | ||||
Abbreviations: B+S-, patients with serum Ca below normal range but without symptoms; B+S+, patients with serum Ca below normal range and symptoms; CND, central lymph node dissection; LND, lateral lymph node dissection; VD, vitamin D; Auto-T, autotransplantation; Pre, preoperative; Po, postoperative.