Table 3.

Sensitivity analyses for the association of hurricane exposure and mortality among patients who are dialysis dependent in the United States from 1997 to 2017

				Demographic and SES-Adjusted Modela
Sensitivity Analysis	No. of Eligible Patients, nb	Events, nb	Events per 1000 Person-Years (95% Confidence Interval)b	Hazard Ratio (95% Confidence Interval)c	P
Accounting for seasonality
Hurricane,d adjusted for month of cohort exit	182,706	102,385	199 (198 to 200)	1.13 (1.05 to 1.21)	0.001
Varying exposure definition
Tropical storm or hurricanee	975,261	564,644	197 (197 to 198)	1.02 (1.00 to 1.05)	0.02
Including precipitationf
Tropical storm or hurricanee and ≥150 mm precipitation	666,461	370,721	217 (217 to 218)	1.02 (0.98 to 1.06)	0.44
Tropical storm or hurricanee and ≥200 mm precipitation	666,461	370,721	217 (217 to 218)	1.05 (0.98 to 1.12)	0.16
Hurricaned and ≥150 mm precipitation	122,100	66,083	220 (218 to 222)	1.11 (0.98 to 1.27)	0.11
Hurricaned and ≥200 mm precipitation	122,100	66,083	220 (218 to 222)	1.27 (1.08 to 1.49)	0.003

SES, socioeconomic status.

^aAdjusted for age, sex, race, and ethnicity, year of dialysis initiation, educational attainment, poverty level, and monthly housing cost.

^bValues are reported for demographic and SES-adjusted model. Complete case analysis was performed.

^cDeath was attributed to a hurricane exposure if it occurred within 30 days of a qualifying weather event.

^dHurricane exposure is defined by exposure to a tropical cyclone with local peak wind speeds of ≥64 knots in the county of residence.

^eTropical storm or hurricane exposure is defined by exposure to a tropical cyclone with local peak wind speeds of ≥34 knots in the county of residence.

^fAnalyses including precipitation were censored on December 31, 2011.