Table 1.

Elements recorded from all included studies. Where no ‘possible values’ are given in the table, this indicates that the values were not restricted to a predetermined list.

recorded element	signification	possible values
transfer mechanism	biological mechanism of horizontal gene transfer modelled	‘conjugation’ or ‘transformation’ or ‘transduction’
bacteria	any species of bacteria explicitly modelled	—
aim of the study	whether the study looked at gene transfer to understand evolutionary trends seen in the bacterial population or to understand its impact on public health, or both	‘evolutionary’ or ‘public health’ or ‘both’
bacterial environment	any environment that contained bacteria in the model	—
antibiotic effect considered	whether one or more antibiotic(s) were present in the model(s)	‘yes’ or ‘no’
multiple resistances considered	whether the model(s) tracked multiple resistance genes that could be transferred separately	‘yes’ or ‘no’
fitness cost of resistance considered	whether the model(s) included a fitness cost for bacteria carrying a resistance gene	‘yes’ or ‘no’
source of model parameters	whether the study also generated its own experimental data to support its parameter values, or chose values informed by previous studies (which could be experimental studies or not), or assumed values	‘experimental’ and/or ‘external’ and/or ‘assumed’
type of model	whether the structure of the model(s) was deterministic or stochastic, or both (if the study presented more than one model)	‘deterministic’ or ‘stochastic’ or ‘both’
type of parameter values	if the model(s) structure was ‘deterministic’, whether the parameter values were constant or were sampled from distributions before each model run	‘constant’ or ‘sampled’
sensitivity analysis performed	whether the study performed any type of sensitivity analysis of the effect of model parameter values on the results	‘yes’ or ‘no’