Table 1.

Clinical features of the studied patients in Tapachula, Chiapas, June through July 2015 ^a.

Symptom	CHIKV+ n = 52	AUFI n = 9	p-Value b	rRT-PCR n = 33	IgM n = 19	p-Value c
Arthralgia	51 (98)	8 (89)	0.275	33 (100)	18 (95)	0.365
Myalgia	51 (98)	9 (100)	1.000	33 (100)	18 (95)	0.365
Headache	47 (90)	8 (89)	1.000	32 (97)	15 (79)	0.054
Retroocular pain	16 (31)	4 (44)	0.458	12 (36)	4 (21)	0.353
Conjunctival hyperemia	21 (40)	3 (33)	1.000	13 (39)	8 (42)	1.000
Shivers	44 (85)	6 (67)	0.343	29 (88)	15 (79)	0.443
Asthenia	39 (75)	4 (44)	0.108	25 (76)	14 (74)	1.000
Rash	32 (62)	5 (56)	0.729	18 (55)	14 (74)	0.240
Pruritus	35 (67)	5 (56)	0.706	22 (67)	13 (68)	1.000
Arthritis *	34 (65)	1 (11)	0.003 *	21 (64)	13 (68)	0.771
Adenopathy	25 (48)	1 (11)	0.065	13 (39)	12 (63)	0.150
Vertigo	17 (33)	3 (33)	1.000	9 (27)	8 (42)	0.360
Gastrointestinal symptoms	50 (96)	8 (89)	0.386	32 (97)	18 (95)	1.000
Abdominal pain	20 (39)	3 (33)	1.000	13 (39)	7 (37)	1.000
Anorexia	40 (77)	6 (67)	0.676	27 (82)	13 (68)	0.317
Dysgeusia	39 (75)	4 (44)	0.108	26 (79)	13 (68)	0.510
Diarrhea	15 (29)	5 (56)	0.139	7 (21)	8 (42)	0.126
Nausea	34 (65)	5 (56)	0.710	24 (73)	10 (53)	0.226
Vomit	5 (10)	2 (22)	0.273	2 (6)	3 (16)	0.342
Hemorrhagic signs	12 (23)	4 (44)	0.224	7 (21)	5 (26)	0.739
Epistaxis	3 (6)	0	1.000	1 (3)	2 (11)	0.546
Gingivorrhagia	5 (10)	2 (22)	0.273	4 (12)	1 (5)	0.641
Petechiae	5 (10)	2 (22)	0.273	3 (9)	2 (11)	1.000

^a Values are no. (%) patients. CHIKV, chikungunya virus; AUFI, acute undifferentiated fever illness; rRT-PCR, real-time reverse transcription PCR; IgM: immunoglobulin M. ^b CHIKV+ vs. AUFI. ^c rRT-PCR vs. IgM. * p < 0.01. Fisher exact test.