Table 1.
Gastric cancer incidence by region and sex for American Indian/Alaska Nativea and white populations in PRCDA counties, 2005–2016.
| Region | Sex | AI/AN Count | AI/AN Rateb | 95% CI for AI/AN Rate | White Rateb | RRc (AI/AN:W) | 95% CI for RR |
|---|---|---|---|---|---|---|---|
| Northern Plains | Both sexes | 225 | 10.4 | 9.0–12.0 | 5.1 | 2.04d | 1.75–2.35 |
| Males | 137 | 14.6 | 11.9–17.6 | 7.5 | 1.94d | 1.59–2.35 | |
| Females | 88 | 7.2 | 5.7–−9.0 | 3.1 | 2.33d | 1.84–2.91 | |
| Alaska | Both sexes | 211 | 20.9 | 18.1–−24.1 | 4.9 | 4.23d | 3.47–5.17 |
| Males | 130 | 27.0 | 22.2–32.6 | 6.9 | 3.93d | 3.04–5.07 | |
| Females | 81 | 15.7 | 12.3–19.6 | 2.9 | 5.39d | 3.83–7.59 | |
| Southern Plains | Both sexes | 282 | 8.8 | 7.7–9.9 | 4.7 | 1.85d | 1.62–2.10 |
| Males | 166 | 12.1 | 10.2–14.2 | 7.0 | 1.73d | 1.44–2.06 | |
| Females | 116 | 6.4 | 5.2–7.7 | 2.9 | 2.20d | 1.78–2.69 | |
| Pacific Coast | Both sexes | 212 | 7.4 | 6.4–8.6 | 5.1 | 1.46d | 1.25–1.68 |
| Males | 117 | 9.0 | 7.2–11.0 | 7.4 | 1.20 | 0.97–1.47 | |
| Females | 95 | 6.3 | 5.0–7.7 | 3.1 | 2.02d | 1.61–2.50 | |
| East | Both sexes | 92 | 8.1 | 6.4–10.0 | 6.0 | 1.34d | 1.07–1.66 |
| Males | 53 | 10.0 | 7.3–13.4 | 8.6 | 1.17 | 0.85–1.56 | |
| Females | 39 | 6.4 | 4.5–−8.9 | 4.0 | 1.63d | 1.14–2.24 | |
| Southwest | Both sexes | 483 | 11.9 | 10.8–−13.1 | 4.3 | 2.78d | 2.51–3.06 |
| Males | 295 | 17.4 | 15.3–19.6 | 6.0 | 2.89d | 2.53–3.27 | |
| Females | 188 | 8.1 | 6.9–−9.3 | 2.7 | 2.93d | 2.50–3.42 | |
| Total | Both sexes | 1,505 | 10.4 | 9.9–11.0 | 5.3 | 1.98d | 1.87–2.09 |
| Males | 898 | 14.2 | 13.2–15.2 | 7.6 | 1.87d | 1.74–2.01 | |
| Females | 607 | 7.6 | 7.0–−8.2 | 3.3 | 2.27d | 2.09–2.47 |
Source: Cancer Registries in the National Program of Cancer Registries (NPCR) of the Centers for Disease Control and Prevention and the Surveillance, Epidemiology, and End Results (SEER) program of the National Cancer Institute
PRCDA purchased/referred care delivery areas; IHS Indian Health Service; AI/AN American Indian/Alaska Native; CI confidence interval; W non-Hispanic white
AI/AN race is reported by NPCR and SEER registries or through linkage with the IHS patient registration database. Updated bridged intercensal population estimates significantly overestimate AI/AN populations of Hispanic origin. All analyses are limited to non-Hispanic AI/AN populations. Non-Hispanic white was chosen as the reference population. The term “non-Hispanic” is omitted when discussing both groups
Rates are per 100,000 and age-adjusted to the 2000 US Standard Population (19 age groups-Census P25–1130) Confidence Intervals (Tiwari model) are 95% for rates and ratios
Rate ratios are AI/AN versus white and calculated in SEER*Stat software before rounding of rates and may not equal the RR calculated from rates presented in table
Indicates that the AI/AN rate is significantly different than the rate for whites (p < 0.05).
Regions defined as follows: AK*, Northern Plains (IL, IN,* IA,* MO,* MN,* MT,* NE,* ND,* SD,* WI,* WY*), Southern Plains (OK,* KS,* TX*), Southwest (AZ,* CO,* NV,* NM,* UT* ), Pacific Coast (CA,* ID,* OR,* WA,* HI), and East (AL,* AR, CT,* DE, FL,* GA, KY, LA,* ME,* MD, MA,* MS,* NH, NJ, NY,* NC,* OH, PA,* RI,* SC,* TN, VT, VA, WV, DC). The * identifies states with at least 1 country designated as PRCDA