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Table 6 Detailed multivariate analysis for self-reported health symptoms in Ogale and Eteo

From: Petroleum contaminated water and health symptoms: a cross-sectional pilot study in a rural Nigerian community

Health symptom Ogale (n = 100) Eteo (n = 100) Crude OR (95 % CI) Adjusted ORa (95 % CI)
Any symptom 68 56 1.6 (0.9, 3.0) 1.8 (1.0, 3.3)
Irritation* 47 25 2.7 (1.5, 4.8) 2.7 (1.5, 5.1)
 Eye* 21 11 2.2 (0.9, 4.7) 2.5 (1.1, 5.7)
 Throat* 8 1 8.6 (1.1, 70.2) 9.1 (1.1, 75.4)
 Skin* 26 5 6.7 (2.5, 18.2) 6.6 (2.4, 18.2)
 Rash 9 1 9.8 (1.2, 78.8) NA
 Runny nose 14 10 1.5 (0.6, 3.5) 1.5 (0.6, 3.5)
 Cough 14 7 2.2 (0.8, 5.6) 2.5 (0.9, 6.5)
Gastrointestinal 17 9 2.1(0.9, 4.9) 2.0 (0.8,5.0)
 Stomach pain 15 6 2.8 (1.0, 7.4) 2.7 (1.0, 7.2)
 Diarrhea 2 4 0.5 (0.1, 2.8) NA
Neurologic* 40 21 2.5 (1.3, 4.7) 2.8 (1.5, 5.5)
 Headache* 36 18 2.6 (1.3, 4.9) 2.7 (1.4, 5.4)
 Sleepiness 7 3 2.4 (0.6, 9.7) NA
 Dizziness* 10 2 5.4 (1.2, 25.5) 6.3 (1.3, 30.4)
Hematologic* 30 13 2.9 (1.4, 6.0) 3.3 (1.5, 7.0)
 Anemia* 18 4 5.3 (1.7, 16.2) 5.9 (1.9, 18.3)
 Malaria 14 9 1.7 (0.7, 4.0) 1.6 (0.7, 4.0)
General pain 8 11 0.7 (0.3, 1.8) 0.8 (0.3, 2.0)
  1. Abbreviations: OR Odds Ratio, NA Not Applicable, odds ratio was not adjusted due to low event frequency in that category
  2. aGeneral health symptom categories, displayed in boldface, were adjusted for age, sex, smoking status, occupation, and education level. Due to small sample sizes, specific symptoms were adjusted for age, sex and smoking status only
  3. *Adjusted odds ratios are statistically significant at P < 0.05