TABLE 2.

Properties of each individual in the contraception and pregnancy model simulation

Property	Description	Categories
co_contraception	“Current contraceptive method” (categorical variable with 11 categories)	“not_using,” “pill,” “IUD,” “injection,” “implant,” “male_condom,” “female_sterilization,” “other_modern,” “periodic_abstinence,” “withdrawal,” “other_traditional”a
is_pregnant	Whether individual is currently pregnant	True, False
date_of_last_pregnancy	Date that the most recent or current pregnancy began.	DATE
co_unintended_preg	Whether the most recent or current pregnancy was unintended.	True, False
co_date_of_last_fp_appt	The date of the most recent family planning appointment. This is used to determine if a family planning appointment is needed to maintain the person on their current contraceptive. If the person is to maintain use of the current contraceptive, an appointment will be scheduled only if the days elapsed since this value exceeds the method‐specific parameter days_between_appts_for_maintenance (see right‐hand column)	DATE set for each method via days_between_appts_for_maintenance: IUD: 4,383 days, implant: 1,461 days injections: 91 days male_condom: 91 days other_modern (female condoma): 91 days, pill: 91 days

co_ is used as a prefix for properties of the contraception module

^a These are the 11 categories of contraception (“not using” + 10 methods) from the DHS analysis of initiation, discontinuation, failure, and switching probabilities. “other modern” includes male sterilization, female condom, emergency contraception (in Malawi only female condom is used by more than a very few people so we only include female_condom in this category). “other traditional” includes lactational amenorrhoea, standard days method, “other traditional method.”