To examine changes in service utilisation before, during and after the 2006 Lebanon War – a 34-day military conflict in northern Israel and Lebanon – among three groups: general population, people ‘at risk’ for depression or anxiety and severely mentally ill individuals. Given that exposure to traumatic events is a pathogenic factor known to cause and exacerbate psychiatric distress and disorder, we hypothesised that healthcare service utilisation would increase in populations exposed to war, especially among more vulnerable populations such as those with mental illness.

A nested case–control design was used to examine changes in health care utilisation and use of psychiatric medication as recorded by the databases of Maccabi Healthcare Services (MHS), one of Israel's largest health maintenance organisations (HMOs). Purchases of benzodiazepines, antidepressants and antipsychotic medications were identified from all the medications purchased in pharmacies by MHS members during 2006. Drug consumption data were expressed as defined daily doses (DDDs), summing all DDDs per person per month. Similarly, number of visits to general practitioners (GPs), psychiatrists and Emergency Rooms (ERs) were summed per person per month. Three-way repeated measures ANOVA was used, including the variables time (12 months), region (north/other) and study group.

During the war there was a decline in GP visits among people from the general population and people ‘at risk’ for depression/anxiety who resided in northern Israel that was not paralleled among controls. Similarly, in all three study groups, there was a decline in the number of psychiatrist visits during the war among people from northern Israel which did not occur to the same extent in the control group. There were no changes in ER visits or use of psychiatric medication that could be attributed to the war.

There is less utilisation of community services at times of war among exposed populations, and there is neither evident compensation in use of emergency services, nor any compensation after the war. This may suggest that if there is an efficient medical and mental health infrastructure, people with or without psychiatric risk factors can tolerate a few weeks of a mass stress event, with no need to expand medical service utilisation. However, service utilisation at times of war may be confounded by other variables and may not serve as a direct measure of increased stress.

While several population-based studies have documented behavioral health disturbances following terrorist attacks, a number of mental health service utilization analyses present conflicting conclusions.

The purpose of this study was to determine if mental health service utilization increased following a terrorist attack by assessing changes in psychoactive drug prescription rates.

The rate of selective serotonin reuptake inhibitor (SSRI) prescriptions was measured among New York State Medicaid enrollees before and after the terrorist attacks of 11 September 2001. The association between geographic proximity to the events and changes in the rate of SSRI prescriptions around 11 September 2001 was assessed.

From September to December 2001, among individuals residing within three miles of the World Trade Center site, there was an 18.2% increase in the SSRI prescription rate compared to the previous eight-month period (p = 0.0011). While there was a 9.3% increase for non-New York City residents, this change was not statistically significant (p = 0.74).

There was a quantifiable increase in the dispensing of psychoactive drugs following the terrorist attacks of 11 September 2001, and this effect varied by geographic proximity to the events. These findings build on the growing body of knowledge on the pervasive effects of disasters and terrorist events for population health, and demonstrate the need to include mental and behavioral health as key components of surge capacity and public health response to mass traumas.