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Table 2 Summary of costs for observations identified as outliers and influential observations

From: Impact of alternative approaches to assess outlying and influential observations on health care costs

  BP outliers Winsor02 Winsor05 DFBETA03 DFBETA15 BP/DFBETA15 Cook’s distance
  N mean (SD) (range)
Overall
  227 152 384 275 16 13 113
52,952 108,152 77,669 99,398 265,093 299,690 164,845
(113,674) (128,017) (94,688) (94,326) (117,330) (98,632) (104,123)
  (43–679,472) (43–679,472) (43–679,472) (100–679,472) (50,397–553,115) (174,413–553,115) (33,642–679,472)
Stage at diagnosis
I 135 68 167 114 8 6 39
14,548 49,340 32,973 63,414 230,744 258,473 132,428
(57,758) (90,478) (67,817) (72,948) (69,944) (55,354) (70,472)
(77–358,478) (77–358,478) (77–358,478) (100–358,478) (132,207–358,478) (213,036–358,478) (45,404–358,478)
II 40 40 91 62 3 2 41
112,481 155,546 116,974 136,742 319,201 453,603 172,793
(166,986) (150,250) (110,805) (119,407) (253,169) (140,731) (127,453)
(43–679,472) (43–679,47) (43–679,472) (105–679,472) (50,397–553,115) (354,092–553,115) (33,642–679,472)
III 24 22 64 40 2 2 22
165,703 207,876 134,272 155,595 241,240 241,240 195,733
(131,600) (97,587) (84,274) (90,093) (94,508) (94,508) (98,996)
(120–405,892) (120–405,892) (120–405,892) (53,407–405,892) (174,413–308,068) (174,413–308,068) (61,253–405,892)
IV 28 22 62 59 3 3 11
56,426 104,038 81,940 91,583 318,483 318,483 188,381
(112,415) (119,830) (84,699) (70,256) (60,079) (60,079) (99,654)
  (71–362,784) (71–362,784) (71–362,784) (362–362,784) (250,098–362,784) (250,098–362,784) (66,227–362,784)
Colectomy
No 73 27 90 110 4 1 14
5,190 16,293 16,885 34,338 153,281 267,611 100,700
(31,172) (59,158) (45,320) (44,217) (89,802) (−−-) (61,065)
(90–267,611) (90–267,611) (90–267,611) (100–267,611) (50,397–267,611) (267,611–267,611) (33,642–267,611)
Yes 154 125 294 165 12 12 99
75,592 127,993 96,276 142,771 302,364 302,364 173,917
(130,482) (130,341) (98,049) (93,989) (102,525) (102,525) (105,947)
  (43–679,472) (43–679,472) (43–679,472) (394–679,472) (174,413–553,115) (174,413–553,115) (45,949–679,472)
  1. BP: box-plot.