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Table 1 Comparison of clinical and corrected data between the observation and control groups

From: Serum calcium–phosphorus product for predicting the risk of osteoporotic vertebral compression fractures in elderly patients: a retrospective observational study

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