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Table 1 Patient characteristics of cohort and sample

From: Validation of administrative data sources for endoscopy utilization in colorectal cancer diagnosis

Characteristics Cohort (%) Sample (%)
Total Number 8310 (100) 1672 (100)
Age at diagnosis   
Mean [Median] 69 [70] 69 [70]
<=65 3042 (37) 643 (38)
66-74 2172 (26) 437 (26)
>=75 3096 (37) 592 (35)
Stage at diagnosis   
I-III 5500 (66) 1145 (68)
IV or Unknown 2810 (34) 527(32)
Type of 1 st colorectal cancer-related visit 1   
Late2 event 2545 (31) 506 (30)
(Pre)Diagnostic event 5765 (69) 1166 (70)
Time from diagnosis to death (days) 3   
Mean [Median] 661 [453] 711 [466]
<= 1 month 491 (11) 84 (10)
1 - 3 months 472 (11) 90(10)
>= 3 months 3431(78) 710 (80)
  1. 1 Limited to healthcare visits within 1 year prior to diagnosis of colorectal cancer.
  2. 2 Late event is defined as a visit that included treatment-related events (e.g., surgery, palliative care) rather than diagnostic or pre-diagnostic events (e.g., radiology, symptoms). Patients who did not have any colorectal cancer-related healthcare visits are also included in this group.
  3. 3 Includes only patients who died on or before March 31, 2009.