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Table 6 Incident Rate Ratios (IRRs) by demographic and NOAA climate region subgroup and overall across all groups of margins from fixed effects meta-regression controlling for demographic and climate region variables with 95% confidence intervals (LCL, UCL) and p-values. Abnormally wet years included in analysis

From: Drought severity and all-cause mortality rates among adults in the United States: 1968–2014

Subgroup

P value

Estimated Mean IRR

LCL

UCL

Age Group

 25–34

0.034

0.997

0.995

1.000

 35–44

0.031

0.998

0.996

1.000

 45–54

0.029

1.002

1.000

1.003

 55–64

0.043

1.001

1.000

1.002

 65–74

0.208

1.001

1.000

1.002

 75–84

0.657

1.000

0.999

1.001

 85+

0.059

1.001

1.000

1.002

Race

 White

<  0.001

0.999

0.998

0.999

 Black

0.121

1.001

1.000

1.002

 Other

0.727

1.000

0.998

1.002

Sex

 Male

0.961

1.000

0.999

1.001

 Female

0.968

1.000

0.999

1.001

Region

 Central

0.731

1.000

0.998

1.001

 East North Central

0.567

1.000

0.999

1.002

 Northeast

0.213

1.001

1.000

1.002

 Northwest

0.796

1.000

0.997

1.002

 South

<  0.001

0.997

0.996

0.998

 Southeast

0.079

0.999

0.998

1.000

 Southwest

<  0.001

1.004

1.003

1.005

 West

<  0.001

0.998

0.997

0.999

 North West Central

0.220

1.001

0.999

1.004

Overall

 

0.962

1.000

0.999

1.001