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. 2022 Sep 8;12:15215. doi: 10.1038/s41598-022-19668-6

Table 1.

Demographic data, surgery and anesthesia related data (N = 95).

Variable N (%) or mean ± SD
Age (years) 4.57 ± 2.06
Male 55 (57.9)
Body weight (kg) 17.10 ± 6.01
Height (cm) 102.29 ± 14.84
ASA classification
 I 47 (49.5)
 II 39 (41.1)
 III 9 (9.5)
Coexisting diseases
 Upper respiratory tract infection 3 (3.2)
 Anemia 18 (18.9)
 Genetic disorder 7 (7.4)
 Cardiovascular system disorder 2 (2.1)
 Respiratory disorder 7 (7.4)
 Central nervous system disorder 4 (4.2)
 Obesity (> 95th percentile weight) 7 (7.4)
Type of surgery
 Eye 61 (64.2)
 Thoracic surgery 3 (3.2)
 Orthopedics 9 (9.5)
 Urologic surgery 1 (1.1)
 Plastic surgery 6 (6.3)
 General surgery 12 (12.6)
 Ear-nose-throat 3 (3.2)
Duration of ultrasound (seconds) 204.4 ± 68.6
Intubation attempts
 1 43 (45.3)
 2 48 (50.5)
 3 4 (4.2)

Data presented as frequency (%) and mean ± standard deviation.

ASA American Society of Anesthesiologists.