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Table 2 Associations between parity and femoral neck BMD

From: Association between parity and bone mineral density in postmenopausal women

Parity

Model 1

Model 2

Model 3

β (95% CI) p value

β (95% CI) p value

β (95% CI) p value

1–2

Reference

Reference

Reference

3–5

0.010 (− 0.007, 0.027) 0.231

− 0.003 (− 0.017, 0.012) 0.738

− 0.003 (− 0.018 , 0.011) 0.670 

≥ 6

0.022 (− 0.029, 0.074) 0.395

0.002 (− 0.043, 0.047) 0.928

0.000  (− 0.044, 0.044) 0.998 

  1. Model 1: no covariates were adjusted
  2. Model 2: age and BMI were adjusted
  3. Model 3: age, BMI, total calcium, serum phosphorus, age at menarche, years since menopause, family PIR, race, education level, smoking behavior, alcohol consumption, PA, HRT, ever treated for osteoporosis, drug use, diabetes, arthritis, emphysema, chronic bronchitis, liver disease, kidney disease, and thyroid disease were adjusted