Table 1.
Estimated number of cases and characteristics of adults having surgery for non-malignant colorectal polyps or colorectal cancer in the US between 2000 and 2014.
| Non-malignant colorectal polyp | Colorectal cancer | |
|---|---|---|
| n = 304,578 | n = 925,880 | |
| Sex, n (%) | ||
| Male | 151,797 (49.9) | 460,032 (49.7) |
| Female | 152,432 (50.1) | 464,944 (50.3) |
| Age, mean (standard deviation) | 65.9 (24.6) | 68.4 (27.9) |
| Race/Ethnicity, n (%) | ||
| Non-Hispanic white | 201,467 (81.1) | 589,731 (79.7) |
| Non-Hispanic black | 25,550 (10.3) | 68,607 (9.3) |
| Hispanic | 12,274 (4.9) | 43,042 (5.8) |
| Other | 9,101 (3.7) | 38,622 (5.2) |
| Missing | 56,186 | 185,877 |
| Primary insurance, n (%) | ||
| Medicare | 165,005 (54.3) | 554,232 (60.1) |
| Medicaid | 7,873 (2.6) | 32,380 (3.5) |
| Private | 122,678 (40.4) | 306,528 (33.2) |
| Other insurance | 5,418 (1.8) | 15,520 (1.7) |
| Self-pay | 2,760 (0.9) | 13,878 (1.5) |
| Household income3, n (%) | ||
| Low | 56,920 (19.0) | 175,011 (19.3) |
| Medium | 75,123 (25.1) | 234,029 (25.7) |
| High | 79,176 (26.5) | 234,285 (25.8) |
| Highest | 87,948 (29.4) | 265,859 (29.2) |
| Hospital bed sizeb, n (%) | ||
| Small | 34,722 (11.4) | 110,733 (12.0) |
| Medium | 77,701 (25.6) | 230,784 (25.0) |
| Large | 191,225 (63.0) | 581,898 (63.0) |
| Hospital type, n (%) | ||
| Urban, teaching | 140,953 (46.4) | 431,046 (46.7) |
| Urban, nonteaching | 128,818 (42.4) | 374,241 (40.5) |
| Rural, nonteaching | 33,877 (11.2) | 118,128 (12.8) |
| Hospital region, n (%) | ||
| Northeast | 57,260 (18.8) | 183,891 (19.9) |
| Midwest | 72,165 (23.7) | 228,297 (24.7) |
| South | 121,704 (40.0) | 332,809 (36.0) |
| West | 53,449 (17.6) | 180,883 (19.5) |
a
Between 2000 and 2002 household income was characterized by the following quartiles: $1–$24,999 (low), $25,000–$34,999 (medium), $35,000–$44,999 (high), and $45,000 and above (highest); from 2003 onward, income was characterized into quartiles within each ZIP code
b
Hospital size categories are based on the number of hospital beds; cut points were chosen for each region and location (rural, non-teaching, urban non-teaching, and urban teaching) combination so that approximately ⅓ of hospitals would appear in each size category