| intEST | Returns the estimates of for an unspecified interaction model | 
| linLIN | Linear regression interaction estimates | 
| loglinHR | Linear interaction HR | 
| loglinOR | Linear interaction OR | 
| plotINT | Plot the result of HR, OR or linear estimates | 
| rcsHR | Restricted cubic spline interaction HR for more than 3 knots | 
| rcsLIN | Restricted cubic spline interaction linear estimates for more than 3 knots | 
| rcsOR | Restricted cubic spline interaction OR for more than 3 knots | 
| umaru | UMARU IMPACT Study data |