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Table 2 Crude and adjusted odds ratios (aOR) of mental health outcomes by exposure group (separated by whether subjects reported damage persisting until year two)

From: The English National Cohort Study of Flooding and Health: the change in the prevalence of psychological morbidity at year two

Outcome by exposure Prevalence % Crude OR (95%CI) aOR* (95% CI) p value**
Probable Depression
 Unaffected 1.5 ref ref  
 All Disrupted 4.1 2.9 (0.7;12.5) 2.5 (0.5;12.0)  
 No persistent damage 3.9 2.8 (0.6;12.0) 2.3 (0.5;10.9) 0.11
 Persistent damage 7.3 5.1 (0.8;31.6) 7.7 (1.0;58.1)
 All Flooded 10.6 8.3 (2.0;34.8) 8.7 (1.9;39.8)  
 No persistent damage 7.2 5.4 (1.2;23.7) 5.8 (1.2;26.9) 0.04
 Persistent damage 20.5 17.1 (3.8;77.0) 14.0 (2.9;67.9)
Probable Anxiety
 Unaffected 2.9 ref ref  
 All Disrupted 6.4 2.4 (0.8;6.8) 1.8 (0.6;5.6)  
 No persistent damage 5.4 2.0 (0.7;5.7) 1.4 (0.4;4.4) 0.001
 Persistent damage 19.5 7.9 (2.2;27.9) 9.2 (2.3;37.1)
 All Flooded 13.6 5.5 (1.9;15.6) 5.2 (1.7;16.3)  
 No persistent damage 10.8 4.2 (1.4;12.4) 4.0 (1.2;12.8) 0.07
 Persistent damage 21.8 9.4 (3.0;29.3) 8.4 (2.4;29.3)
Probable PTSD
 Unaffected 0 ref ref  
 All Disrupted 8.9 ∞ (3.7;∞) not estimable  
 No persistent damage 6.9 ref2*** ref2*** 0.000
 Persistent damage 34.1 6.8 (3.2;14.4) 10.7 (4.4;26.2)
 All Flooded 24.5 ∞ (12.7;∞) not estimable  
 No persistent damage 18.4 Ref2*** Ref2*** 0.000
 Persistent damage 43.6 3.7 (2.1;6.6) 5.2 (2.6;10.3)
  1. Note: total participants n = 988; total participants with persistent damage n = 119; total participants without persistent damage n = 846; missing n = 23
  2. *Adjusted odds ratios are adjusted for age, sex, pre;existing illness, deprivation, local authority, ethnicity, marital, education and employment statuses
  3. **the p;values are for the test of the null hypothesis that the aORs for those with and without persistent damage are equal
  4. ***for PTSD, because there were no cases in the unaffected group, the group without persistent damage was taken as the reference group when comparing this group with that with persistent damage