Table 1.

Comparison of clinical and corrected data between the observation and control groups

Clinical characteristics	OVCF	Non-OVCF	t/χ2	P value
Patients, no	400	400
Mean age, years	71.50 ± 6.41	72.43 ± 8.04	t = −1.286	0.199
Sex, no. (male: female)	78: 322	102: 298	χ2 = 2.065	0.151
Hypertension, no	94	114	χ2 = 1.672	0.196
Diabetes mellitus, no	56	68	χ2 = 0.687	0.407
Albumin, g/L	37.70 ± 3.47	38.35 ± 2.74	t = −2.088	0.037
Blood urea nitrogen, mmol/L	5.48 ± 1.45	5.68 ± 1.33	t = −1.455	0.146
Serum creatinine, μmol/L	61.83 ± 12.59	60.70 ± 12.06	t = 0.917	0.360
Serum calcium, mmol/L	2.22 ± 0.12	2.26 ± 0.13	t = −3.667	< 0.001
Serum phosphorus, mmol/L	1.03 ± 0.13	1.13 ± 0.12	t = −7.988	< 0.001
Ca–P product	28.40 ± 4.09	31.87 ± 3.84	t = −8.482	< 0.001
Corrected serum calcium, mmol/L	2.27 ± 0.09	2.30 ± 0.13	t = −2.590	0.010
Corrected Ca–P product	29.14 ± 3.97	32.36 ± 3.84	t = −8.294	< 0.001