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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