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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).

From: Pediatric appendicitis rupture rate: a national indicator of disparities in healthcare access

   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)
  1. *Chi-square p < 0.01.