Table 3 Laboratory findings of pediatric patients hospitalized with COVID-19, Tehran, Iran, 2020 on admission among different groups

Decreased WBC count

21 (15) [n = 139]

14 (16) [n = 90]

7 (14) [n = 49]

18 (14) [n = 125]

3 (21) [n = 14]

19 (15) [n = 128]

2 (18) [n = 11]

Normal WBC count

66 (48) [n = 139]

46 (51) [n = 90]

20 (41) [n = 49]

61 (49) [n = 125]

5 (36) [n = 14]

59 (46) [n = 128]

7 (64) [n = 11]

Increased WBC count

52 (37) [n = 139]

30 (33) [n = 90]

22 (45) [n = 49]

46 (37) [n = 125]

6 (43) [n = 14]

50 (39) [n = 128]

2 (18) [n = 11]

Decreased neutrophil count

57 (42) [n = 136]

39 (44) [n = 89]

18 (38) [n = 47]

52 (42) [n = 124]

5 (42) [n = 12]

52 (42) [n = 125]

5 (46) [n = 11]

Normal neutrophil count

53 (39) [n = 136]

32 (36) [n = 89]

21 (45) [n = 47]

48 (39) [n = 124]

5 (42) [n = 12]

49 (39) [n = 125]

4 (36) [n = 11]

Increased neutrophil count

26 (19) [n = 136]

18 (20) [n = 89]

8 (17) [n = 47]

24 (19) [n = 124]

2 (16) [n = 12]

24 (19) [n = 125]

2 (18) [n = 11]

Decreased lymphocyte count

21 (15) [n = 136]

14 (16) [n = 89]

7 (15) [n = 47]

18 (14) [n = 124]

3 (25) [n = 12]

18 (14) [n = 125]

3 (27) [n = 11]

Normal lymphocyte count

93 (68) [n = 136]

61 (68) [n = 89]

32 (68) [n = 47]

90 (73) [n = 124]

3 (25) [n = 12]

85 (68) [n = 125]

8 (73) [n = 11]

Increased lymphocyte count

22 (16) [n = 136]

14 (16) [n = 89]

8 (17) [n = 47]

16 (13) [n = 124]

6 (50) [n = 12]

22 (18) [n = 125]

0

Decreased platelet count

30 (21) [n = 140]

14 (16) [n = 91]

16 (33) [n = 49]

23 (18) [n = 126]

7 (50) [n = 14]

26 (20) [n = 129]

4 (36) [n = 11]

Normal platelet count

92 (66) [n = 140]

65 (71) [n = 91]

27 (55) [n = 49]

86 (68) [n = 126]

6 (43) [n = 14]

85 (66) [n = 129]

7 (64) [n = 11]

Increased platelet count

18 (13) [n = 140]

12 (13) [n = 91]

6 (12) [n = 49]

17 (14) [n = 126]

1 (7) [n = 14]

18 (14) [n = 129]

0

Elevated urea

15 (11) [n = 137]

6 (7) [n = 88]

9 (18) [n = 49]

8 (6.5) [n = 123]

7 (50) [n = 14]

15 (12) [n = 126]

0

Elevated creatine phosphokinase

11 (11) [n = 98]

6 (9) [n = 68]

5 (17) [n = 30]

9 (10) [n = 90]

2 (25) [n = 8]

8 (9) [n = 89]

3 (33) [n = 9]

Elevated lactate dehydrogenase

30 (26) [n = 117]

15 (19) [n = 80]

15 (40.5) [n = 37]

23 (21.5) [n = 107]

7 (70) [n = 10]

25 (24) [n = 106]

5 (45.5) [n = 11]

Elevated alanine aminotransferase

53 (51) [n = 104]

29 (43) [n = 68]

24 (67) [n = 36]

45 (49.5) [n = 91]

8 (61.5) [n = 13]

47 (50.5) [n = 93]

6 (54.5) [n = 11]

Elevated aspartate aminotransferase

35 (36) [n = 97]

21 (33) [n = 63]

14 (41) [n = 34]

29 (34.5) [n = 84]

6 (46) [n = 13]

29 (34) [n = 86]

6 (54.5) [n = 11]

Elevated C-reactive protein

88 (69) [n = 128]

53 (65) [n = 82]

35 (76) [n = 46]

73 (65) [n = 115]

13 (100) [n = 13]

81 (69) [n = 117]

7 (64) [n = 11]

Elevated Erythrocyte sedimentation rate

102 (79) [n = 129]

69 (81) [n = 85]

33 (75) [n = 44]

93 (80) [n = 116]

9 (69) [n = 13]

92 (78) [n = 118]

10 (91) [n = 11]

Elevated prothrombin time

52 (40) [n = 129]

27 (32) [n = 84]

25 (56) [n = 45]

43 (37) [n = 116]

9 (69) [n = 13]

49 (41.5) [n = 118]

3 (27) [n = 11]

Elevated procalcitonin

31 (33) [n = 94]

22 (34) [n = 64]

9 (30) [n = 30]

28 (32) [n = 88]

3 (50) [n = 6]

25 (30) [n = 83]

6 (54.5) [n = 11]

Decreased albumin

50 (73) [n = 68]

6 (15) [n = 40]

12 (43) [n = 28]

14 (24) [n = 58]

6 (60) [n = 10]

17 (29) [n = 59]

1 (11) [n = 9]