Table 1.

The number and the risk ratios of pilot aircraft-assisted suicides five years before and three years after 11 September 2001, in the U.S.

Follow-Up Period	Dates	No. of Suicides	No. of Fatal Aviation Accidents	FRQ	Risk Ratio	95% Confidence Interval
Reference	11 September 1996–10 September 2001	6	1861	0.32%	1.00	Reference
1st year	12 September 2001–11 September 2002	4	337	1.19%	3.68	1.04–12.98
2nd year	12 September 2002–11 September 2003	3	375	0.80%	2.48	0.62–9.88
3rd year	12 September 2003–11 September 2004	1	354	0.28%	0.88	0.11–7.26

FRQ = frequency.