Table 6. Colonoscopy resources required for each risk scoring system.
| Scoring system | NNS N (95% C.I.) | NNRN (95% C.I.) |
|---|---|---|
| US (Seattle)1 | 16 (9–26) | 9 (4–17) |
| US physician health survey2 | 12 (6–21) | 5 (2–12) |
| Spain3 | 16 (9–26) | 10 (5–18) |
| Germany4 | 19 (11–30) | 9 (4–17) |
| Poland5 | 19 (11–30) | 10 (5–18) |
| Korean Colorectal Screening (KCS)6 | 16 (9–26) | 10 (5–18) |
| Modified APCS7 | 16 (9–26) | 8 (3–16) |
NNS: Number needed to screen with colonoscopy to detect one advanced neoplasm; NNR: Number needed to refer for colonoscopy to detect one advanced neoplasm; CI = confidence interval
1Lin et al. (2006) Gastroenterology 131:1011-1019.
2Driver et al. (2007). Am J Med 120:257-263 (*Only male subjects were included).
3Betes et al. (2003). Am J Gastroenterol 98:2648-2654.
4Tao et al. (2014). Clin Gastrointest Hepatol 12:478-485(*Only non-smokers, non-drinkers and those not taking lots of meat were included).
5Kaminski et al. (2014). Gut 63:1112-1119 (*Only non-smokers aged 66 or below were included).
6Kim et al. (2014). J Clin Gastroenterol Feb 27. [Epub ahead of print].
7Sung et al. (2014). Gastroenterology 2014; 146:S-730.