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Table 1 Case Control Study: Univariate analysis of risk factors

From: Outbreak report of investigation and control of an outbreak of Panton-Valentine Leukocidin-positive methicillin-sensitive Staphylococcus aureus (PVL-MSSA) infection in neonates and mothers

Variable Category Controls
(n = 81)
Cases
(n = 16)
P-value
Sex Female 34 (42%) 9 (56%) 0.41
  Male 47 (58%) 7 (44%)  
Gest age (weeks) 35.6 ± 4.5 31.7 ± 2.7 0.001
Birthweight (g) 2456 ± 997 1550 ± 702 < 0.001
Admission location Northwick Park 72 (89%) 15 (94%) 1.00
  Other 9 (11%) 1 (6%)  
Length of stay 6 [1, 15] 25 [22, 29] < 0.001
Mother’s ethnicity White 22 (28%) 5 (31%) 0.73
  Asian 17 (21%) 5 (31%)  
  Black 37 (%) 6 (38%)  
  Other 4 (5%) 0 (0%)  
Mode of delivery Vaginal 44 (55%) 2 (12%) 0.002
  CS 36 (45%) 14 (88%)  
Birth location Northwick Park 73 (27%) 15 (94%) 1.00
  Other 8 (10%) 1 (6%)  
  1. Summary statistics are mean ± standard deviation, median [inter-quartile range] or number (percentage)
  2. CS Caesarean Section