Table 1

National estimates of ruptured and unruptured appendicitis cases for children 4–18 years old. Obtained from the KID Year 2000 data set. (Weighted count of cases = 62,555).



Ruptures (%)
Non-ruptures (%)

Race/ethnicity*
white
12,056 (29%)
29,514 (71%)

black
1,474 (36%)
2,579 (63%)

Hispanic
5,539 (36%)
1,001 (64%)

Asian
499 (36%)
893 (64%)

Gender
male
11,947 (31%)
26,247 (69%)

female
7,613 (31%)
16,726 (69%)

Age group*
4–8
5,387 (42%)
7,591 (58%)

9–11
4,189 (31%)
9,221 (69%)

12–14
5,075 (31%)
11,444 (69%)

15–18
4,918 (25%)
14,731 (75%)

ZIP code median annual household income*
$0–$24,999
2,059 (38%)
3,399 (62%)

$25,000–$34,999
5,612 (33%)
11,573 (67%)

$35,000–$44,999
5,284 (30%)
12,097 (70%)

≥ $45,000
6,309 (29%)
15,198 (71%)

Expected primary payer*
private
12,226 (29%)
29,866 (71%)

public
5,552 (37%)
9,351 (63%)

other
1,554 (33%)
3,179 (67%)

Admission source*
emergency department
13,068 (30%)
30,273 (70%)

other healthcare referral
4,461 (35%)
8,281 (65%)

other
1,097 (32%)
2,193 (68%)

Hospital type*
teaching
9,552 (35%)
18,114 (65%)

other
10,016 (29%)
24,836 (71%)

Pediatric discharge volume*
4–1,578
4,759 (28%)
12,474 (72%)

1,579–3,471
4,343 (28%)
11,213 (72%)

3,472–6,582
4,320 (32%)
9,568 (68%)

6,583–22,785
6,045 (38%)
9,733 (62%)



Means (95% CIs)

Length of stay*

5.5 (5.4–5.6)
2.0 (1.9–2.0)
Total charges*

$17,905 ($17,473–$18,336)
$9,076 ($8,956–$9,198)

*Chi-square p < 0.01.

Jablonski and Guagliardo Population Health Metrics 2005 3:4   doi:10.1186/1478-7954-3-4