Table 1 Demographic data of the study population and outdoor/indoor thermal data byseason

Male gender, n (%)

59 (50)

73 (46)

54 (56)

57 (48)

0.50

Gestational age, wks

39.3 ± 1.1

39.4 ± 1.2

39.5 ± 1.1

39.4 ± 1.2

0.42

Birth weight, g

3078 ± 361

3038 ± 337

3084 ± 370

3100 ± 335

0.49

Hematocrit level, %

51.4 ± 5.6

52.4 ± 5.9

52.0 ± 6.0

52.2 ± 5.6

0.59

INR level

1.07 ± 0.08

1.11 ± 0.10

1.07 ± 0.09

1.06 ± 0.07

< 0.001

Climatic conditions

Maximum temperature, °C

20.4 ± 3.8

31.2 ± 3.8

22.2 ± 5.8

10.8 ± 2.9

< 0.001

Minimum temperatue, °C

10.6 ± 4.5

23.5 ± 2.6

13.8 ± 5.2

3.1 ± 3.4

< 0.001

Average temperature, °C

15.3 ± 3.8

27.3 ± 3.0

18.0 ± 5.4

7.0 ± 3.0

< 0.001

Relative humidity, %

49.0 ± 20.4

66.0 ± 10.6

56.0 ± 17.2

46.6 ± 15.3

< 0.001

Thermal environment of the newborn nursery

Room temperature, °C

26.7 ± 0.5

26.0 ± 0.4

26.3 ± 0.5

26.5 ± 0.4

<0.001

Relative humidity, %

31.3 ± 9.1

64.1 ± 6.7

38.9 ± 14.1

25.8 ± 3.3

<0.001