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Table 3 Association between experience of breastfeeding, duration of breastfeeding and knee osteoarthritis (OA) (n = 3454)

From: Relationship of breastfeeding duration with joint pain and knee osteoarthritis in middle-aged Korean women: a cross-sectional study using the Korea National Health and Nutrition Examination Survey

Factors

Unadjusted

Model 1

Model 2

OR (95% CI)

OR (95% CI)

OR (95% CI)

Breastfeeding experience (dichotomized)

 Non-breastfeed

1

1

1

 Breastfeed ≥1 mth

2.41 (1.54, 3.77)a

1.44 (0.92, 2.27)

1.92 (0.94, 3.92)

Breastfeeding duration (categorized)

 None

1

1

1

 1–24 mths

0.93 (0.57, 1.53)

1.05 (0.65, 1.70)

1.60 (0.79, 3.23)

 25–48 mths

2.18 (1.35, 3.52)b

1.67 (1.03, 2.71)c

2.30 (1.09, 4.86)c

 ≥ 49 mths

4.37 (2.76, 6.93)a

1.69 (1.03, 2.78)c

2.17 (1.01, 4.64)c

 p for trend

<.001

0.004

0.062

  1. Model 1 was adjusted by age
  2. Model 2 was adjusted by age, BMI, household income, smoking, alcohol consumption, physical activity, diabetes, hypertension, children, abortion, menopausal status, hormone replacement therapy
  3. OR odds ratio, 95% CI 95% confidence interval
  4. a p < 0.001, b p < 0.01, c p < 0.05