Table 4.

Breakdown of computed tomography (CT) use and negative appendicectomy rate (standard definition)

Year	Total number of patients	CT performed	No CT	Negative appendicectomy
1996	74			8 (10.8%)
1997	81			9 (11.1%)
1998	57			5 (8.8%)
1999	74			8 (10.8%)
2000	94			5 (5.3%)
1996–2000	380			35 (9.2%)
Breakdown	231 male (61%)
	149 female (39%)
2001	93	62	31	4 (4.3%)
2002	86	67	21	1 (1.2%)
2003	100	83	17	2 (2.0%)
2004	97	82	16	5 (5.2%)
2005	88	80	8	1 (1.1%)
2006	89	82	7	2 (2.2%)
2007	88	83	5	1 (1.1%)
2008	89	79	10	5 (5.6%)
2009	106	96	10	3 (2.8%)
2010	90	88	2	3 (3.3%)
2001–2010	926	801 (86.5%)	125 (13.5%)	27 (2.9%)
Breakdown	605 male (65%)	499 male	106 male
	321 female (35%)	302 female	19 female
2001–2005	464	374 (80.6%)	90 (19.4%)	13 (2.8%)
Breakdown	308 male (66%)	232 male	76 male
	156 female (34%)	142 female	14 female
2006–2010	462	427 (92.4%)	35 (7.6%)	14 (3.0%)
Breakdown	297 male (64%)	267 male	30 male
	165 female (36%)	160 female	5 female