From: Determinants of mastitis in women in the CASTLE study: a cohort study
Correlate (occurring from hospital onwards) | Number of women with at least one mastitis event | Person-years at risk of first mastitis event | Estimated Incidence Rate Ratio (IRR) | 95 % CI for IRR | p value | |
---|---|---|---|---|---|---|
Any nipple damage | yes | 55 | 31.8 | 2.17 | 1.21, 3.91 | 0.01 |
no | 15 | 18.3 | ||||
“Over-producing milk” | yes | 26 | 9.7 | 2.60 | 1.58, 4.29 | <0.005 |
no | 44 | 40.4 | ||||
Attachment problem | yes | 45 | 24.3 | 1.96 | 1.18, 3.24 | 0.009 |
no | 25 | 25.8 | ||||
Use of nipple shield | yes | 23 | 7.4 | 2.93 | 1.72, 5.01 | <0.005 |
no | 47 | 42.7 | ||||
Expressing several times a day | yes | 33 | 17.7 | 1.64 | 1.01, 2.68 | 0.047 |
no | 37 | 32.4 | ||||
Use of hydrogel dressings | yes | 15 | 7.0 | 1.72 | 0.96, 3.09 | 0.071 |
no | 55 | 43.0 | ||||
S. aureus isolated from nipple | yes | 46 | 26.5 | 1.72 | 1.04, 2.85 | 0.035 |
no | 24 | 23.5 | ||||
S. aureus isolated from milk | yes | 44 | 24.6 | 1.78 | 1.08, 2.92 | 0.023 |
no | 26 | 25.4 | ||||
S. aureus isolated from infants | yes | 55 | 34.1 | 1.74 | 0.97, 3.11 | 0.062 |
no | 15 | 15.9 |