Table 1 Characteristics of infants with Staphylococcus aureus infection during the two study periods
Period A (n = 41) | Period B (n = 115) | |||
|---|---|---|---|---|
Characteristics | MSSA (n = 31) | MRSA (n = 10) | MSSA (n = 51) | MRSA (n = 64) |
Birth weight (g) | ||||
Median (25th-75th percentile) | 752 (553-977) | 737 (563-1120) | 838 (647-1081) | 736 (580-945) |
Category, n (%) | ||||
<750 | 16 (52) | 4 (40) | 21 (42) | 37 (58) |
751 – 1000 | 7 (23) | 0 (0) | 14 (28) | 17 (26) |
1001 – 1250 | 2 (6) | 2 (20) | 8 (16) | 4 (6) |
1251 – 1500 | 2 (6) | 2 (20) | 2 (4) | 1 (2) |
>1500 | 4 (13) | 2 (20) | 5 (10) | 5 (8) |
Gestational age (weeks) | ||||
Median (25th-75th percentile) | 27 (25-29) | 27 (24-31) | 27 (26-30) | 27 (25-29) |
Category, n (%) | ||||
23-25 | 9 (29) | 3 (30) | 9 (18) | 20 (31) |
26-28 | 12 (39) | 3 (30) | 25 (48) | 23 (36) |
29-31 | 6 (19) | 2 (20) | 11 (22) | 13 (20) |
≥32 | 4 (13) | 2 (20) | 6 (12) | 8 (13) |
Gender | ||||
Male (%) | 12 (39) | 5 (50) | 26 (51) | 32 (50) |
Female (%) | 17 (61) | 5 (50) | 25 (49) | 32 (50) |
Frequency of invasive procedures | ||||
n (%) | 27 (87) | 9 (90) | 46 (90) | 55 (86) |
Mechanical ventilation | ||||
n (%) | 29 (94) | 9 (90) | 47 (92) | 60 (94) |
Age at diagnosis (days) | ||||
Median | 27 | 25 | 22 | 25 |