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Table 1 Demographics based on the study groups

From: The effects of position on gastric residual volume of premature infants in NICU

Groups

Quantitative variables

Group one

Mean (standard deviation)

Group two

Mean (standard deviation)

Group three

Mean (standard deviation)

Total

Mean (standard deviation)

Statistical test

Age (day)

6.13 (4.15)

4.69 (3.90)

6.09 (3.82)

5.63 (3.99)

×2 = 7.36*

P = 0.025**

Pregnancy age (week)

31.67 (2.26)

32.64 (2.24)

31.8 (2.45)

32.08 (2.34)

×2 = 4.65*

P = 0.097

Infant’s weight (gr.)

1664.44 (537.10)

1954.22 (573.23)

1633.33 (432.36)

1750.67 (533.89)

×2 = 8.96*

P = 0.011**

Groups

Qualitative variables

Group one

Mean (standard deviation)

Group two

Mean (standard deviation)

Group three

Mean (standard deviation)

Total

Mean (standard deviation)

Statistical test

Apgar score

7

13 (28.9)

24.4))11

17.8))8

23.7))32

=6.164

P = 0.405

8

20 (44.4)

33.3))15

53.3))24

43.7))59

9

(22.29)10

28.9))13

22.2))10

24.4))33

10

4.4))2

13.3))6

6.7))3

8.1))11

Total

(100)45

(100)45

100))45

100))135

Gender

Boy

35.6))16

75.6))34

64.4))29

58.5))79

P < 0.001**

Girl

64.4))29

24.4))11

16.6))16

41.5))56

Cause of hospitalization

Prematurity

24.4))11

57.8))26

37.8))17

40))54

=14.4

P = 0.025**

Respiratory failure

60))27

22.2))10

42.2))19

41.5))56

Multiple pregnancy

6.7))3

8.9))4

8.9))4

8.1))11

Sepsis

4 (9.8)

11.1))5

11.1))5

10.4))14

Delivery

Natural delivery

20))9

2.2))1

8.9))4

10.4))14

7.81=

P = 0.02**

Caesarian section

80))36

97.8))44

91.1))41

89.6))121

  1. *is related Kruskal-Wallis H Test
  2. **is significant