Characteristic Serum vitamin B12 Serum vitamin B12 Serum vitamin B12
Coefficient 95% CI P value
Age (year) 0.18 -1.91 – 2.28 0.862
Sex Sex Sex Sex
Male Reference Reference Reference
Female 36.83 -25.10 – 98.75 0.236
TSH 2.89 -19.90 – 25.69 0.799
Lifetime syncopal episodes Lifetime syncopal episodes Lifetime syncopal episodes Lifetime syncopal episodes
Infrequent (<3 episodes) Reference Reference Reference
Frequent (≥3 episodes) -73.97 -138.54 – -9.40 0.026