Table 3. Clinical characteristics according to the follow-up group.

Characteristics		Follow-up group	Follow-up loss group	P value
No. of patients		442 (72.1)	171 (27.9)
Age, yr		3.26 ± 4.86	4.08 ± 5.90	0.082
Sex				0.358
	Male	270 (61.1)	97 (56.7)
	Female	172 (38.9)	74 (43.3)
Follow-up discontinuation by				< 0.001
	Physician	352 (79.6)	108 (63.2)
	Patient	90 (20.4)	63 (36.8)
Diagnosis
	Respiratory infection	193 (43.7)	89 (52.0)	0.279
	Gastrointestinal infection	69 (15.6)	42 (24.6)	0.011
	Urinary tract infection	75 (17.0)	15 (8.8)	0.011
	Other febrile disease	86 (19.5)	30 (17.5)	0.646
	EBV infection	36 (8.1)	1 (0.6)	0.001
	CMV infection	5 (1.1)	0 (0)	0.329
Physician				< 0.001
	Non-GI pediatrician	317 (71.7)	98 (52.0)
	Pediatric gastroenterologist	114 (25.8)	12 (24.6)
	Pediatric resident	2 (0.5)	7 (8.8)
	Emergency doctor	9 (2.0)	54 (17.5)
Initial laboratory data
	AST, IU/L	199.2 ± 288.6	85 ± 59.7	< 0.001
	ALT, IU/L	226.4 ± 340.5	99.3 ± 71.9	< 0.001
	TB, mg/dL	0.60 ± 0.73	0.48 ± 0.41	0.04
	DB, mg/dL	0.25 ± 0.46	0.17 ± 0.19	0.95
	Albumin, g/dL	4.19 ± 0.48	4.30 ± 0.39	0.05
	GGT, IU/L	91.0 ± 133.9	51.6 ± 42.6	0.32
	ALP, U/L	349.1 ± 273.1	419.0 ± 296.7	0.06
	WBC, /uL	11,871 ± 5,159.7	10,992.3 ± 4,737.4	0.191
Peak laboratory data
	AST, IU/L	236.3 ± 319.4		< 0.001*
	ALT, IU/L	282.1 ± 384.6		< 0.001*
	TB, mg/dL	0.63 ± 0.87		0.032*
	DB, mg/dL	0.25 ± 0.49		0.1*
Final laboratory data
	AST, IU/L	50.0 ± 32.4		< 0.001*
	ALT, IU/L	60.6 ± 68.5		< 0.001*
	TB, mg/dL	0.38 ± 0.39		0.009*
	DB, mg/dL	0.12 ± 0.11		0.003*

Values are presented as mean ± standard deviation or number (%).

EBV = Epstein-Barr virus, CMV = cytomegalovirus, GI = gastrointestinal, AST = aspartate transaminase, ALT = alanine aminotransferase, TB = total bilirubin, DB = direct bilirubin, GGT = gamma glutamyl transferase, ALP = alkaline phosphatase, WBC = white blood cell count.

^*P values were calculated by comparison to initial liver function tests in the follow-up loss group.