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ADPCPROJ: Age-Drift-Period-Cohort Projections

Source: R/models-adpcproj.R
adpcproj.Rd

R functions for projection of cancer incidence/mortality. Revising nordpred and introducing negative binomial distribution when lack of fit appears from nordpred, additional link functions of sqrt and identity, and settings of startage and startuseage.

get_projections() extracts annual projection results from an adpcproj() object.

Usage

adpcproj(
  cdat,
  pdat,
  projfor = "incidence",
  n5case = NULL,
  noperiods = NULL,
  recent = NULL,
  startage = NULL,
  newcohort = FALSE,
  pGOF = 0.05,
  cuttrd = 0.04,
  shortp = 0,
  linkfunc = "power5"
)

# S3 method for class 'adpcproj'
get_projections(object, ..., cdat, pdat, startp, standpop = NULL)

Arguments

cdat

(age groups) * N (years) historical cancer data, 15<=N<=125.

pdat

(age groups) * (N + M) (years) observed and projected population, 5<=M<=25.

projfor

Specify "incidence" or "mortality" if you want ASR as a criteria for nagg.

n5case

Minimum number of cancer cases/deaths per 5 years for splitting data.

noperiods

List of candidate periods for projection base. Default (NULL) uses a goodness-of-fit test to determine if ancient periods are removed.

recent

Estimate drift term from recent trend (T) or whole trend (F). Default (NULL) uses compares models to pick.

startage

Youngest age group to include in the GLM. Default (NULL) picks based on mean cases.

newcohort

Assign new cohort effect as 0 (FALSE) or the last estimated cohort effect (TRUE), default is 0, use TRUE only if having evidence on negative new cohort effect.

pGOF

Model selection criteria of p-value of goodness-of-fit.

cuttrd

Degenerating percent of trends per year after 5 years (shortp = 0) or the first projection year.

shortp

Attenuation percent of drift term or slope for the first 5 projection years.

linkfunc

Link function. Default is "power5". Can be one of "log", "sqrt", or "identity".

object

Output from adpcproj().

...

Not currently used.

startp

The start calendar year of projection (e.g., 2009).

standpop

A StandardPopulation object that provides the weights (proportions) for each age group in a standard population.

Value

adpcproj() returns a list.

get_projections() returns a data.frame.