Table 2. Summary statistics for age-period-cohort models of colon and rectal cancer, year 1958-1997*, aged 30-84 years.
| Terms in model | Residual | Change† | p value for test statistics‡ |
adj-R2A | |||
| Df | G2 | Δdf | ΔG2 | ||||
| Colon | |||||||
| Males | |||||||
| Age (p=0.00001) | 77 | 3385.50 | |||||
| Age+period (AP) | 70 | 180.69 | 16 | 100.30 | 0.00004§ | 0.94 | |
| Age+cohort (AC) | 60 | 95.07 | 6 | 14.66 | 0.15404∥ | 0.96 | |
| Age+period+cohort (APC) | 54 | 80.41 | 0.97 | ||||
| Females | |||||||
| Age (p=0.00001) | 77 | 1507.20 | |||||
| Age+period (AP) | 70 | 71.34 | 16 | 21.30 | 0.16727§ | 0.95 | |
| Age+cohort (AC) | 60 | 63.49 | 6 | 13.45 | 0.03642∥ | 0.95 | |
| Age+period+cohort (APC) | 54 | 50.04 | 0.95 | ||||
| Rectum | |||||||
| Males | |||||||
| Age (p=0.00001) | 77 | 1131.80 | |||||
| Age+period (AP) | 70 | 133.34 | 16 | 54.28 | 0.01116§ | 0.87 | |
| Age+cohort (AC) | 60 | 84.28 | 6 | 5.22 | 0.73397∥ | 0.90 | |
| Age+period+cohort (APC) | 54 | 79.06 | 0.90 | ||||
| Females | |||||||
| Age (p=0.00001) | 77 | 299.48 | |||||
| Age+period (AP) | 70 | 87.46 | 16 | 31.09 | 0.01310§ | 0.68 | |
| Age+cohort (AC) | 60 | 63.49 | 6 | 11.32 | 0.07898∥ | 0.71 | |
| Age+period+cohort (APC) | 54 | 56.37 | 0.73 | ||||
* : Original incidence data for the 9 unequally spaced time periods during 1959-1997 was reorganized into 8 five-year time period groups including 1958. The method for editing this data is described in METHODS.
† : Comparisons between submodels and APC model.
‡ : For males, the F-test was used, and for females, the χ2-test was used.
§ : AP vs. APC.
∥ : AC vs. APC.