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Table 1 Demographic characteristics of the study population

From: Association of breastfeeding and postmenopausal osteoporosis in Chinese women: a community-based retrospective study

Characteristic

All women (n = 202)

Non-osteoporosis (n = 52)

Osteoporosis (n = 150)

p-value*

Age (year)

69.42 ± 6.48

65.29 ± 3.877

70.85 ± 6.60

< 0.001

BMI (kg/m2)

24.11 ± 1.86

23.65 ± 1.76

24.27 ± 1.87

0.033

Height (cm)

159.78 ± 4.41

161.48 ± 4.25

159.19 ± 4.35

0.001

Weight (kg)

61.64 ± 6.28

61.74 ± 6.03

61.60 ± 6.38

0.890

Smoking,n (%)

 Yes

10 (5.0%)

0 (0.0%)

10 (6.7%)

0.056

 No

192 (95.0%)

52 (100%)

140 (93.3%)

 

Alcohol, n (%)

 Yes

2 (1.0%)

0 (0.0%)

2 (1.3%)

0.403

 No

200 (99.0%)

52 (100%)

148 (98.7%)

 

Fracture, n (%)

 Yes

4 (2.0%)

1 (1.9%)

3 (2.0%)

0.973

 No

198 (98.0%)

51 (98.1%)

147 (98%)

 

Calcium intake per day n (%)

  ≤ 500 mg

132 (65.3%)

34 (65.4%)

98 (65.3%)

0.995

  > 500 mg

70 (34.7%)

18 (34.6%)

52 (34.7%)

 

Vitamin D intake per day n (%)

  ≤ 400 IU

138 (68.3%)

36 (69.2%)

102 (68.0%)

0.869

  > 400 IU

64 (31.7%)

16 (30.8%)

48 (32.0%)

 
  1. BMI body mass index.
  2. *p-value are calculate using Chi-square test for categorical variables, t-test for continuous variables
  3. p<0.05 were considered significant. Entries in boldface are significant