Table 2. Clinical characteristics of RPI-KD, KD (i.e., KD without RPI), and bacterial RPA

Variables	RPI-KD		KD		Bacterial RPA		References
Male sex (%)	50.0	(n = 10)	60.0	(n = 20)	56.3	(n = 16)	[11]
	81.8	(n = 11)	–		58.3	(n = 36)	[12]
	52.9	(n = 22)	–		54.5	(n = 34)	[13]
	66.7	(n = 21)	–		55.5	(n = 18)	[14]
	60.0	(n = 10)	61.8	(n = 267)	–		[15]
	67.9	(n = 130)	59.3	(n = 20,657)	–		[16]
Age (years)	5.5	(n = 10)	2.61)	(n = 20)	4.7	(n = 16)	[11]
	4.0	(n = 11)	–		4.0	(n = 36)	[12]
	5.6	(n = 22)	–		5.7	(n = 34)	[13]
	5.0	(n = 21)	–		4.5	(n = 18)	[14]
	4.5	(n = 10)	1.01)	(n = 267)	–		[15]
	5.0	(n = 130)	2.01)	(n = 20,657)	–		[16]
Duration of fever (days)	7.0	(n = 10)	7.1	(n = 20)	5.4	(n = 16)	[11]
	6.01)	(n = 11)	–		5.0	(n = 36)	[12]
	10.1	(n = 22)	–		8.7	(n = 34)	[13]
	5.0	(n = 21)	–		5.0	(n = 18)	[14]
	4.5	(n = 10)	4.0	(n = 267)	–		[15]
Neck pain (%)	100.0	(n = 10)	25.01)	(n = 20)	100.0	(n = 16)	[11]
	36.4	(n = 11)	–		44.4	(n = 36)	[12]
	81.8	(n = 22)	–		79.4	(n = 34)	[13]
	57.12)	(n = 21)	–		94.4	(n = 18)	[14]
Dysphagia (%)	60.0	(n = 10)	0.01)	(n = 20)	68.7	(n = 16)	[11]
	9.1	(n = 11)	–		25.0	(n = 36)	[12]
	0.02)	(n = 22)	–		17.6	(n = 34)	[13]
	23.82)	(n = 21)	–		61.1	(n = 18)	[14]
Limited motion of neck (%)	100.0	(n = 10)	25.01)	(n = 20)	93.7	(n = 16)	[11]
	45.5	(n = 11)	–		47.2	(n = 36)	[12]
	63.6	(n = 22)	–		64.7	(n = 34)	[13]
	52.4	(n = 21)	–		83.3	(n = 18)	[14]

P < 0.01,
P < 0.05.
RPI-KD: Kawasaki disease with retropharyngeal inflammation; KD: Kawasaki disease; RPA: retropharyngeal abscess.