Table 1 Characteristics in normal control (NC), osteopenia (ON) and osteoporosis (OP) groups (n = 684)

From: Metagenomic analysis revealing links between age, gut microbiota and bone loss in Chinese adults

Variables

Total (n = 684)

Normal control (NC, n = 194)

Osteopenia (ON, n = 344)

Osteoporosis (OP, n = 146)

P-valuea

P-valueb

OP vs. NC

ON vs. NC

OP vs. ON

Bone mass density (BMD, mg/cm3)

 L1-BMD

109.7 (31.18)

145.37 (19.18)

106.65 (14.34)

69.16 (15.54)

5.77 × 10114

6.19 × 10124

8.75 × 10100

1.78 × 1093

 L2-BMD

103.15 (30.20)

138.58 (18.82)

99.54 (13.05)

64.26 (13.49)

5.09 × 10118

8.13 × 10129

1.37 × 10107

4.94 × 10100

 L3-BMD

99.86 (30.92)

135.54 (18.73)

96.60 (14.83)

60.08 (14.31)

1.30 × 10114

1.26 × 10127

1.92 × 10100

4.73 × 1091

 Mean BMD

104.17 (29.67)

139.78 (16.56)

100.91 (11.72)

64.55 (12.39)

2.40 × 10125

3.37 × 10144

1.97 × 10125

3.28 × 10118

Demographics and anthropometrics

 Age, years

58.72 (6.18)

55.71 (4.98)

58.22 (5.24)

63.91 (6.47)

5.24 × 1031

4.96 × 1032

5.36 × 1008

6.70 × 1023

 Sex (Female %), No

330 (48.25%)

76 (39.18%)

161 (46.80%)

93 (63.70%)

3.29 × 1005

1.26 × 1005

0.11

8.85 × 104

 Body mass index, kg/m2

25.36 (3.34)

25.65 (3.33)

25.24 (3.22)

25.24 (3.62)

0.28

/

/

/

 Waist-hip ratio

0.88 (0.07)

0.88 (0.07)

0.88 (0.07)

0.88 (0.07)

0.39

/

/

/

  1. Data were presented as mean ± SD or n (percentage %).
  2. BMI body mass index (BMI), WHR waist–hip ratio, Mean BMD mean BMD value of lumber vertebrae L1 to L3.
  3. P-value a: Kruskal–Wallis test for continuous data or Chi-squared test for categorical data among three groups.
  4. P-value b: Analysis of covariance (ANCOVA) test for comparing variables between each two groups, after adjusting for confounding factors, including sex, age, BMI, WHR, lifestyles and dietary habits.