Table 1

- Comparison of the groups regarding demographic and clinical data.

	Serum 25(OH)D level
Variables	Deficient¹		Insufficient²		Normal³		p¹
	(n=46)		(n=16)		(n=13)
	Mean ± SD	IQR 25-75%	Mean ± SD	IQR 25-75%	Mean ± SD	IQR 25-75%
Age (years)	82.14 ± 6.73	78-87	81.06 ± 7.12	76-85.5	80.38 ± 7.25	74-85	0.582 (F=.545)
Body mass index (kg/m²)	26.56 ± 2.54	24.57–27.82	25.80 ± 2.34	24.25-27.86	25.69 ± 2.28	24.29-26.18	0.382 (F=.975)
Serum 25(OH)D level during hospitalization (ng/mL)	13.33 ± 4.43	9.57-17.10	23.22 ± 2.62	20.55-25.42	40.24 ± 7.79	34.55-48	0.001^{1-2, 1-3, 2-3} (F=158.01)
Number of chronic diseases	2.02 ± 0.90	1-3	2 ± 0.81	1.25-2	1.76 ± 1.16	1-2.5	0.688 (F=.376)
Preoperative waiting time (hours)	12.76 ± 3.84	11-14	13.93 ± 3.69	12-15.75	14.15 ± 5.01	10-18	0.413 (F=.896)
Total hospitalization time (hours)	67.95 ± 13.93	56-79.25	66.18 ± 15.76	56-79.25	69.69 ± 17.13	55.50-85.50	0.819 (F=.200)
Mean follow-up time (months)	23.04 ± 12.29	12.75-32	25.81 ± 13.89	12-39	23.84 ± 14.05	9.50-36.50	0.763 (F=.272)
	n	%	n	%	n	%	p²
Gender
Male	16	34.8	2	12.5	4	30.8	0.239
Female	30	65.2	14	87.5	9	69.2	0.239
Affected extremity
Dominant	16	34.8	8	50	4	30.8	0.481
Non-dominant	30	65.2	8	50	9	69.2	0.481
Anesthesia type
General	17	37	5	31.5	8	61.5	0.202
Regional	29	63	11	68.5	5	38.5	0.202
Postoperative intensive care entrance
Yes	7	15.2	3	18.8	3	23.1	0.792
No	39	84.8	13	81.2	10	76.9	0.792
Presence of delirium
Yes	7	15.2	3	18.8	2	15.4	0.944
No	39	84.8	13	81.2	11	84.6	0.944

Significant p-values highlighted in bold. p¹: One-way analysis of variance (ANOVA), p²: Pearson Chi-square analysis, SD: Standard deviation, CI: 95% confidence interval, kg: kilogram, m: meter, ng/mL: nanograms per milliliter, 25(OH)D: 25-hydroxyvitamin D,