Table 2.

Sensitivity of estimates of relative risk on the peak flood day (July 21, 2012) to study design and modeling choices. The first row repeats the estimates generated based on our primary analysis (also shown in Table 1). All other rows show estimates based on alternative study design or modeling choices; see the Methods for descriptions of each. Shown in parentheses are the 95% confidence intervals for each estimate.

	All-cause mortality	Circulatory mortality	Respiratory mortality	Accidental mortality
Primary analysis	1.34 (1.11, 1.61)	1.37 (1.01, 1.85)	0.94 (0.52, 1.72)	4.40 (2.98, 6.51)
Matching by month	1.35 (1.11, 1.63)	1.38 (1.01, 1.88)	0.91 (0.50, 1.66)	3.86 (2.70, 5.54)
PM2.5-adjusted	1.33 (1.09, 1.62)	1.32 (0.97, 1.79)	0.90 (0.49, 1.66)	4.55 (2.96, 6.98)
Not temperature-adjusted	1.27 (1.02, 1.57)	1.28 (0.92, 1.77)	0.88 (0.48, 1.64)	4.22 (2.87, 6.21)
Time series	1.30 (1.11, 1.52)	1.33 (1.06, 1.67)	0.93 (0.55, 1.56)	5.48 (3.73, 8.06)
Case-crossover	1.33 (1.09, 1.62)	1.38 (1.04, 1.83)	0.85 (0.46, 1.57)	6.64 (3.48, 12.67)