Table 2. Comparison of underlying variables associated with influenza-related deaths obtained by 2 surveillance systems, Los Angeles County, California, USA, 2009–2010*.

Condition†

Surveillance method, no. (%)

EDRS	ICR
Any	53 (62)	102 (97)
Developmental disability	3 (4)	13 (12)
Pregnancy	1 (1)	3 (3)
Obesity	2 (2)	52 (50)

*EDRS, electronic death reporting system; ICR, individual case report.
†p<0.002.