Table 2.
Univariate analysis of influencing factors among neonates with Staphylococcus aureus and MRSA carriage in Shenzhen, 2015
| Influencing factors |
S. aureus (n=60)
|
MRSA (n=15)
|
|||||
|---|---|---|---|---|---|---|---|
| N | Positive (%) | χ2 | P-value | Positive (%) | χ2 | P-value | |
| Mothers | |||||||
| Nasal carriage | 473 | 29 (6.1) | 16.24 | 0.00 | 2 (1.9) | NA | 0.21 |
| Vaginal carriage | 133 | 21 (15.8) | NA | 0.00 | 1 (3.2) | NA | 0.23 |
| Both nasal and vaginal carriage | 60 | 9 (15.0) | NA | 0.00 | 0 (0) | NA | 0.78 |
| Age (>35 years) | 114 | 5 (4.4) | NA | 0.49 | 0 (0) | NA | 0.31 |
| Education (below high school) | 1287 | 46 (3.6) | 1.57 | 0.21 | 12 (0.9) | NA | 0.38 |
| Vaginal delivery | 1420 | 54 (3.8) | NA | 0.02 | 13 (0.8) | NA | 0.54 |
| Natural impregnation | 1809 | 60 (3.3) | NA | 1.00 | 15 (0.8) | NA | 1.00 |
| First pregnancy | 606 | 20 (3.3) | 0.002 | 0.964 | 4 (0.7) | 0.28 | 0.60 |
| First parturition | 924 | 26 (2.8) | 1.24 | 0.27 | 6 (0.7) | 0.66 | 0.42 |
| History of abortion | 660 | 18 (2.7) | 0.71 | 0.40 | 5 (0.8) | 0.06 | 0.81 |
| Frequency of vaginal examination after hospitalization (≤2) | 533 | 29 (5.4) | 5.97 | 0.02 | 10 (1.9) | NA | 0.007 |
| Vaginitis | 150 | 4 (2.7) | NA | 0.81 | 1 (0.7) | NA | 1.00 |
| Premature rupture of membranes | 364 | 6 (1.7) | 3.88 | 0.049 | 0 (0) | NA | 0.05 |
| Days of hospitalization (>3) | 1372 | 40 (2.9) | 1.53 | 0.22 | 8 (0.6) | NA | 0.12 |
| Weeks of pregnancy (<37) | 15 | 1 (6.7) | NA | 0.44 | 0 (0) | NA | 1.00 |
| Tobacco use during pregnancy | 5 | 0 (0) | NA | 1.00 | 0 (0) | NA | 1.00 |
| Antibiotic use during pregnancy | 115 | 3 (2.6) | NA | 0.68 | 1 (0.9) | NA | 1.00 |
| Pet owner | 72 | 3 (4.2) | NA | 0.51 | 1 (1.4) | NA | 0.45 |
| Neonates | |||||||
| Male gender | 991 | 40 (4.0) | 3.99 | 0.046 | 8 (0.8) | 0.003 | 0.96 |
| Birth weight (<2500 g) | 52 | 1 (1.9) | NA | 1.00 | 0 (0) | NA | 1.00 |
| Admission to neonatology ward | 162 | 4 (2.5) | NA | 1.00 | 0 (0) | NA | 1.00 |
| Apgar 1st minute ≤3 | 0 | 0 (0) | NA | NA | 0 (0) | NA | NA |
| Apgar 5th minute ≤6 | 0 | 0 (0) | NA | NA | 0 (0) | NA | NA |
Notes: N indicates the number of patients for whom information was available; n indicates the number of isolates. This was a univariate analysis of influencing factors.
Abbreviations: NA, not applicable; MRSA, methicillin-resistant S. aureus.