Increases in summer serum 25-hydroxyvitamin D (25OHD) concentrations in elderly subjects in São Paulo, Brazil vary with age, gender and ethnicity

Table 1 Laboratory and Clinical Variables according to the gender of the volunteers

	Reference Values	Men (n = 47)	Women (n = 52)	P value
Age (years)	-	67.8 ± 4.9	67.4 ± 6.0	0.689
Weight (kg)	-	74.0 ± 15.0	68.0 ± 14.7	0.050
BMI	19-25 kg/m²	28.1 ± 4.0	27.6 ± 4.7	0.089
Total Calcium	8.8-10.2 mg/dL	9.6 ± 0.3	9.8 ± 0.3	0.030
Ionized Calcium	1.24-1.42 mmol/L	1.31 ± 0.03	1.32 ± 0.04	0.359
Albumin	3.2-5.6 g/L	4.1 ± 0.2	4.0 ± 0.2	0.159
Alkaline Phosphatase	50-250 U/L	127 [64-268]	140 [115-171]	0.725
Phosphorus	2.5-4.5 mg/dL	2.8 ± 0.4	3.3 ± 0.4	< 0.001
Creatinine	0.4-1.5 mg/dL	1.07 ± 0.12	0.90 ± 0.10	< 0.010
25OHD winter	> 50.0 nmol/L	81.2 ± 30.1 (a)	76.7 ± 31.8	0.472
25OHD summer	> 50.0 nmol/L	107.6 ± 31.4 (a)	76.7 ± 24.0	< 0.001
PTH winter	10-55 pg/mL	26.1 ± 15.7 (b)	23.6 ± 9.5 (c)	0.340
PTH summer	10-55 pg/mL	19.1 ± 11.7 (b)	14.9 ± 7.6 (c)	0.058
CTX winter	0.01-5.94 ng/mL	0.354 ± 0.160	0.402 ± 0.222	0.222
CTX summer	0.01-5.94 ng/mL	0.375 ± 0.162	0.403 ± 0.215	0.485
OC winter	11-43 ng/mL	21.0 ± 7.7	21.8 ± 8.4	0.089
OC summer	11-43 ng/mL	24.5 ± 10.3	24.2 ± 10.0	0.228

The Student's t-test was used to evaluate differences between men and women (Mean and Standard-Deviation), except for alkaline phosphatase (Mann-Whitney Test, median and variation interval).
P < 0.05 was considered significant. Comparisons represented by letters a, b and c were significantly different (P < 0.001).

ISSN: 1472-6823