Post-gastrectomy patients need to be followed up for 20-30 years

Table 1 Prevalence of iron, B₁₂ or vitamin D deficiency in male and female patients

Parameter and sex	1969	1978	1984	1988
Gastrectomy population
Male	165	99	59	40
Female	62	42	20	12
Iron deficiency %
Male	31.5a	61.6	62.7	67.5
Female	61.3	59.5	80.0	91.7
B12 deficiency %
Male	3.0	19.2	59.3b	70.0
Female	0	28.6	90.0	83.3
Vitamin D deficiency %
Male	1.8c	4.0d	1.7e	0f
Female	11.3	26.2	25.0	33.3

^aP < 0.0001,

^bP = 0.0131,

^cP = 0.0005,

^dP = 0.0003,

^eP = 0.0039,

^fP = 0.0018, males vs females.