Table 2.

Comparison of clinical presentation, physical examination, and laboratory test

Variable	Perforated group (n=78)	Non-perforated group (n=145)	Total (N=223)	P-value
Time duration from onset of symptoms to ED arrival, hours, median (IQR)	24 (17.2–48)	19 (9.1–24)	24 (11.5–30.6)	<0.01
Time duration from onset of symptoms to ED arrival >24 hours	36 (46.2)	36(24.8)	72 (32.3)	0.02
Fever	25 (32.1)	38 (26.2)	63 (28.3)	0.42
Right lower abdominal pain	55 (70.5)	115 (79.3)	170 (76.2)	0.191
Migratory pain	20 (25.6)	49 (33.8)	69 (30.9)	0.27
Nausea/vomiting	43 (55.1)	73 (50.3)	116 (52)	0.58
Anorexia	17 (21.8)	20 (13.8)	37 (16.6)	0.179
Heart rates ≥90 beats/minute	41 (52.6)	51 (35.2)	92 (41.3)	0.018
Respiratory rates ≥20 breaths/minute	59 (75.6)	75 (51.7)	134 (60.1)	<0.001
SBP ≥90 mmHg	78 (100)	144 (99.3)	222 (99.6)	1
Right lower abdominal tenderness	67 (85.9)	135 (93.1)	202 (90.6)	0.27
Rebound tenderness	55 (70.5)	105 (72.4)	160 (71.7)	0.27
Localized guarding at right lower abdominal quadrant	10 (12.8)	10 (6.9)	20 (9)	0.218
Generalized guarding	8 (10.3)	1 (0.7)	9 (4)	0.001
Leukocytosis (WBC count ≥10,000/μL)	56 (71.8)	114 (78.6)	170 (76.2)	0.329
Neutrophils >75% median (IQR)	81 (74–87)	81 (75–87)	81 (75–87)	0.914
Band cells >10%	8 (25)	3(10.3)	11 (18)	0.249
Alvarado score (points)				0.37
≤4	17 (21.8)	22 (15.2)	39 (17.5)
5–6	30 (38.5)	54 (37.2)	84 (37.7)
≥7	31 (39.7)	69 (47.6)	100 (44.8)
Presentation
Typical presentation	15 (19.2)	22 (15.2)	37 (16.6)	0.556
Atypical presentation	63 (80.8)	123 (84.8)	186 (83.4)	0.556

Notes: Data are presented as n (%) unless indicated otherwise. Values <0.05 are statistically significant.

Abbreviations: ED, emergency department; IQR, interquartile range; SBP, systolic blood pressure; WBC, white blood cell.