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Table 2 Health characteristics of participants in a case control study of mastitis.

From: A case-control study of mastitis: nasal carriage of Staphylococcus aureus

  Cases (N = 100) n (%) Controls (N = 99) n (%) Odds Ratio 95% CI Significance*
Mother's Health       
Breast surgery: 7/100 (7) 5/99 (5) 1.42 0.43 4.62 p = 0.565
Past history staphylococcal infection 23/100 (23) 12/99 (12) 2.17 1.01 4.64 **p = 0.047
Past history candida infection 16/97 (17) 8/95 (9) 2.15 0.87 5.29 p = 0.096
Past history mastitis (previous child) 12/100 (12) 12/99 (12) 0.99 0.42 2.32 p = 0.979
Smoker 5/100 (5) 4/99 (4) 1.25 0.33 4.80 p = 0.745
Anaemic 10/100 (10) 5/99 (5) 2.09 0.69 6.35 p = 0.194
Scored below average on vitality score (from SF36) 61/100 (61) 26/99 (26) 4.39 2.41 8.01 **p = 0.000
Baby's Health       
Unwell 16/100 (16) 11/98 (11) 1.51 0.66 3.43 p = 0.330
Difficulty breastfeeding 57/100 (57) 14/99 (14) 8.05 4.04 16.05 **p = 0.000
  1. (n = 100 women with mastitis and 99 breastfeeding controls). Melbourne, Australia, 2002–2004.
  2. *chi-square test for all analyses.
  3. **statistically significant.