Health behavior change in advance care planning: an agent-based model

BMC Public Health

Table 2 Variables in the model

Baseline distribution of agents across stages	Bounds	SIM 1	SIM 2	Expected^a
pre-contemplation	0–100	100	40^b
contemplation	0–100	0	40^b
preparation	0–100	0	20^b
action-maintenance	0–100	0	0^b
Baseline point value for each stage
pre-contemplation	0–100	0	100
contemplation	0–100	0	50
preparation	0–100	0	0
action-maintenance	0–100	0	50
Thresholds
contemplation	0–100	60	100
preparation	0–100	20	50
action-maintenance	0–100	10	0
Points
Experiences ICU stay	0–10	4	6
Experiences loved one’s illness	0–10	3	4
Interacts with other agents at higher stages	0–10	3	2
Interacts with other agents at lower stages	−10–0	1	2
Visits primary care (PCP)	0–10		1
Globals
Probability of experiencing ICU stay	0–10	3	3
Probability of experiencing loved one’s illness	0–10	6	7
Probability of interacting with primary care	0–10		10
Other Parameters
Agents in pre-contemplation are not influenced by other agents’ stages upon interaction
Susceptibility	0–100	100	50
Movement rate in local networks			0.15
Outcomes
%pre-contemplation	0–100	0	21.4	40
%contemplation	0–100	0	20.4	10
%preparation	0–100	0	6.8	3
%action-maintenance	0–100	100	51.4	47

ISSN: 1471-2458