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Table 2 Mortality, odds ratios (OR) and adjusted odds ratios (AOR) among internally displaced persons in Ampara, Sri Lanka due to the 2004 Indian Ocean tsunami.

From: Who died as a result of the tsunami? – Risk factors of mortality among internally displaced persons in Sri Lanka: a retrospective cohort analysis

   N mortality OR (95% CI) AOR (95% CI)
Total   3,533 12.9%   
Individual level      
   Age (years) <5 343 31.8% 5.87 (4.03–8.55)*** 5.90 (4.21–8.26)***
  5–9 376 23.7% 3.91 (2.69–5.68)*** 3.94 (2.74–5.66)***
  10–14 424 10.1% 1.42 (0.94–2.16) 1.41 (0.92–2.16)
  15–19 435 9.2% 1.28 (0.83–1.95) 1.14 (0.75–1.74)
  20–29 748 7.4% 1.00 1.00
  30–39 464 7.5% 1.03 (0.66–1.60) 0.97 (0.63–1.49)
  40–49 383 8.1% 1.11 (0.70–1.76) 1.18 (0.75–1.85)
  >50 360 15.3% 2.27 (1.52–3.39)*** 2.53 (1.62–3.96)***
   Sex Male 1,732 8.2% 1.00 1.00
  Female 1,801 17.5% 2.37 (1.92–2.94)*** 2.79 (2.29–3.39)***
   Location when tsunami hit own house 3,042 13.8% 1.00  
  someone's house 31 22.6% 1.82 (0.78–4.25)  
  mosque/temple 3 0.0% 0.00  
  other inside 52 11.5% 0.81 (0.35–1.92)  
  around own house 204 7.4% 0.50 (0.29–0.85)**  
  Beach 32 9.4% 0.65 (0.20–2.13)  
  Sea 36 8.3% 0.57 (0.17–1.86)  
  other outside 133 2.3% 0.14 (0.05–0.46)***  
  inside total 3,128 13.8% 2.55 (1.67–3.91)*** 2.87 (1.44–5.71)**
  Outside total 405 5.9% 1.00 1.00
   Pre-existing health problem No 3,194 12.8% 1.00  
  Yes 339 14.2% 1.12 (0.81–1.55)  
Household level      
   Living area Karaitivu 1,847 12.1% 1.00  
  Sainthamarthu 986 14.0% 1.19 (0.94–1.49)  
  Kalmunai 801 13.5% 1.13 (0.89–1.45)  
   Living periods (years) 0–9 661 13.6% 1.00  
  10–19 775 15.2% 1.14 (0.85–1.53)  
  20–29 1,095 12.0% 0.86 (0.65–1.15)  
  >30 994 11.9% 0.85 (0.64–1.15)  
   Ethnicity Shinhalese 10 10.0% 0.80 (0.10–6.36)  
  Tamil 1,806 12.2% 1.00  
  Muslim 1,717 13.7% 1.15 (0.94–1.40)  
   Educational level no school 260 7.7% 0.46 (0.28–0.75)** 0.41 (0.20–0.88)*
  Primary 887 15.3% 1.00 1.00
  secondary 2,141 13.3% 0.84 (0.68–1.05) 0.90 (0.65–1.25)
  Higher 245 6.9% 0.41 (0.24–0.70)*** 0.48 (0.24–0.95)*
   Occupation Farming 127 9.5% 1.00  
  Fishing 1,433 15.4% 1.75 (0.95–3.22)  
  Laborer 1,122 10.3% 1.11 (0.59–2.06)  
  Trader 155 10.3% 1.10 (0.50–2.43)  
  professional 122 6.6% 0.67 (0.26–1.71)  
  Others 574 14.6% 1.64 (0.87–3.11)  
  Fishing 1,433 15.4% 1.44 (1.18–1.75)*** 1.38 (1.04–1.85)*
  Others 2,100 11.2% 1.00 1.00
   Household income (Rupee) Nothing 132 12.9% 1.00  
  1–2999 1,221 12.0% 0.93 (0.54–1.59)  
  3000- 1,348 13.4% 1.05 (0.62–1.79)  
  6000- 567 12.5% 0.97 (0.55–1.71)  
  10000- 210 16.2% 1.31 (0.70–2.45)  
  15000- 55 12.7% 0.99 (0.38–2.54)  
   Level of house destruction less than half 195 4.6% 1.00 1.00
  more than half 308 5.5% 1.21 (0.53–2.77) 1.52 (0.51–4.55)
  Totally 3,030 14.2% 3.43 (1.74–6.75)*** 3.79 (1.49–9.66)**
  1. * p < 0.05, ** p < 0.01, *** p < 0.001
  2. CI; confidence interval
  3. † Adjusted odds ratios were obtained by a logistic regression model, containing variables for age band, sex, location when tsunami hit, educational level, fishing as an occupation and the house destruction level.