TABLE 1.

Baseline characteristics of general clinical data, serum BTMs, and biochemical indices in the two groups

Variable	Reference Range	Group 1 (n = 36)	Group 2 (n = 99)	t	P
Age (y)	-	65.3 ± 8.5	66.9 ± 8.3	−0.951	0.344
BMI (kg/m2)	-	22.1 ± 2.9	22.9 ± 3.7	−1.189	0.237
Menopausal duration (y)	-	13.2 ± 8.2	14.7 ± 8.2	−0.071	0.944
Follow-up time (mo)	-	12.5 ± 1.8	12.2 ± 1.4	0.841	0.404
LS 1-4 BMD (g/cm2)	-	0.964 ± 0.184	0.884 ± 0.163	2.430	0.016
TH BMD (g/cm2)	-	0.825 ± 0.123	0.764 ± 0.123	2.537	0.012
FN BMD (g/cm2)	-	0.749 ± 0.106	0.703 ± 0.114	2.132	0.035
25(OH)D (ng/mL)	>25	29.9 ± 13.1	26.8 ± 8.2	1.326	0.191
N-MID (ng/mL)	14-46	15.70 ± 6.86	17.23 ± 8.03	−1.013	0.313
P1NP (ng/mL)	0.00-36.40	36.22 ± 18.80	39.13 ± 21.20	−0.726	0.469
β-CTX (ng/mL)	≤1.008	0.306 ± 0.212	0.329 ± 0.232	−0.533	0.595
UA (μmol/L)	140-360	319.9 ± 80.2	322.0 ± 68.8	−0.149	0.882
ALP (U/L)	0-110	69.2 ± 14.0	74.5 ± 19.9	–1.470	0.144
Calcium (mmol/L)	2.10-2.60	2.31 ± 0.10	2.28 ± 0.11	1.576	0.118
Phosphorus (mmol/L)	0.97-1.62	1.12 ± 0.13	1.13 ± 0.15	−0.287	0.774
Magnesium (mmol/L)	0.70-1.10	0.90 ± 0.07	0.88 ± 0.08	1.669	0.097
ACP (U/L)	0.00-10.00	7.9 ± 2.0	8.1 ± 1.9	−0.712	0.477
NACP (U/L)	0.00-6.50	4.3 ± 1.0	4.4 ± 1.0	−0.210	0.834
PACP (U/L)	0.00-3.50	3.7 ± 0.7	3.8 ± 0.9	−0.333	0.739

Data are presented as mean ± standard deviation. All P values were calculated with the t test. P value < 0.05 was considered to indicate a statistically significant difference (highlighted in bold). - indicates none.

ACP, acid phosphatase; ALP, alkaline phosphatase; β-CTX, β-C-terminal telopeptide of type I collagen; BMD, bone mineral density; 25(OH)D, 25-hydroxy vitamin D; BMI, body mass index; BTMs, bone turnover markers; FN, femoral neck; LS, lumbar spine; NACP, non-prostatic acid phosphatase; N-MID, N-terminal middle segment osteocalcin; PACP, prostatic acid phosphatase; P1NP, propeptide of type I procollagen; TH, total hip; UA, uric acid.