. 2023 Jul 22;62(7):3009–3019. doi: 10.1007/s00394-023-03213-w

Table 5.

Effect of vitamin D intake on hemoglobin levels

	Estimate, 95% CI, P_{(Week × treatment)}^a
	FE vs FEMT^b	FE vs PCG^b
Week 2 × treatment	< 0.00, [−0.43, 0.43], 0.989	−0.43, [−0.87, 0.01], 0.053
Week 4 × treatment	0.52, [0.09, 0.95], 0.019*	−0.14, [−0.58, 0.29], 0.512
Week 6 × treatment	0.36, [−0.07, 0.79], 0.100	−0.33, [−0.76, 0.10], 0.130

Bold values represent the significantly different (*P < 0.05, ** P < 0.01)

^aThe crude model (analyzed in Table 2) was adjusted for vitamin D intake, and the effect of treatment on hemoglobin levels was estimated. The test statistics are marked as *P < 0.05

^bPCG placebo control group; FE intervention group administered 6 mg iron alone once daily; FEMT intervention group administered 200 mg methionine, 400 mg threonine, and 6 mg iron once daily