(A) Hypothermia incidents | Age (hours) | |||||
2 | 4 | 8 | 16 | 24 | ||
n=109 | n=920 | n=918 | n=906 | n=887 | ||
Severity classifications | ||||||
WHO* | Mullany† | |||||
Mild | Grade 1: <36.5–36.0 °C, n (%) | 13 (11.9) | 124 (13.5) | 105 (11.4) | 41 (4.5) | 19 (2.1) |
Moderate | Grade 2: <36.0–35.0 °C, n (%) | 5 (4.6) | 25 (2.7) | 15 (1.6) | 1 (0.11) | 0 |
Moderate | Grade 3: <35.0–34.0 °C, n (%) | 0 | 1 (0.11) | 0 | 1 (0.11) | 0 |
Moderate | Grade 4‡: <34.0 °C, n | 0 | 0 | 0 | 0 | 0 |
Severe: < 32.0 °C | 0 | 0 | 0 | 0 | 0 | |
Hypothermia§ (<36.5°C) total, n (%) | 18 (16.5) | 150 (16.3) | 120 (13.1) | 43 (4.7) | 19 (2.1) | |
(B) Room temperature | ||||||
Mean (SD), °C | 24.0 (1.1) | 23.8 (1.0) | 23.8 (1.0) | 23.7 (0.90) | 23.8 (0.90) | |
Median, °C | 23.9 | 23.8 | 23.8 | 23.7 | 23.8 | |
Quartiles (25–75 P), °C | 23.4–24.6 | 23.2–24.4 | 23.2–24.4 | 23.1–24.3 | 23.2–24.4 | |
Range, °C | 20.0–29.4 | 20.0–28.1 | 21.0–32.0 | 21.4–27.2 | 21.3–27.1 |
*Hypothermia as defined by WHO.1
†Hypothermia grades as suggested by Mullany.7
‡Mullany hypothermia Grade 4 comprises the lower segment of WHO moderate hypothermia <34.0°C and WHO severe hypothermia (<32.0°C).
§A total of 350 measurements of rectal temperature <36.5°C in 270 infants.
P, Percentile; SD, Standard deviation.