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Table 1 Characteristics of farmers

From: The use of self-reported symptoms as a proxy for acute organophosphate poisoning after exposure to chlorpyrifos 50% plus cypermethrin 5% among Nepali farmers: a randomized, double-blind, placebo-controlled, crossover study

Variable Total (n = 42) Group A (n = 21) Group B (n = 21) P value*
Men, n (%) 42 (100) 21 (100) 21 (100)  
Age (years)     0.134a
 Mean (SD) 38.1 (9.4) 35.9 (8.6) 40.2 (10.0)  
Education, n (%)     0.917+,b
 No education 4 (9.5) 2 (9.5) 2 (9.5)  
 1st–4th grade 6 (14.3) 2 (9.5) 4 (19.0)  
 5th–8th grade 9 (21.4) 5 (23.8) 4 (19.0)  
 9th–12th grade 23 (54.8) 12 (57.1) 11 (52.4)  
 Median (IQR) 10 (4.8–10) 10 (6.0–10.0) 10 (3.0–10.0)  
Involvement in farming (years), n (%)     0.208+,b
 1–10 18 (42.9) 12 (57.1) 6 (28.6)  
 11–20 13 (31.0) 4 (19.0) 9 (42.9)  
 21–30 5 (11.9) 3 (14.3) 2 (9.5)  
  > 30 6 (14.3) 2 (9.5) 4 (19.0)  
 Median (IQR) 12.0 (8.0–22.3) 10.0 (6.0–21.5) 13.0 (10.0-24-0)  
Pesticide use (years), n (%)     0.398+,b
 1–10 24 (57.1) 15 (71.4) 9 (42.9)  
 11–20 13 (31.0) 3 (14.3) 10 (47.6)  
 21–30 5 (11.9) 3 (14.3) 2 (9.5)  
 Median (IQR) 10.0 (4.8–13.3) 8.0 (4.0–14.0) 11.0 (5.0–13.5)  
Marital status, n (%)     0.148c
 Currently married 36 (85.7) 18 (85.7) 18 (85.7)  
 Divorced/Separated 2 (4.8) 0 2 (9.5)  
 Never married 4 (9.5) 3 (14.3) 1 (4.8)  
Body Mass Index (kg/m2)     0.505b
 Median (IQR) 22.3 (19.8–24.9) 21.4 (18.3–25.9) 22.7 (21.4–23.4)  
Alcohol drinking, n (%)     0.317d
 Yes 13 (31.0) 5 (23.8) 8 (38.1)  
 No 29 (69.0) 16 (76.2) 13 (61.9)  
Smoking, n (%)     1.000e
 Yes 7 (16.7) 3 (14.3) 4 (19.0)  
 No 35 (83.3) 18 (85.7) 17 (81.0)  
Chewing tobacco, n (%)     0.212d
 Yes 18 (42.9) 11 (52.4) 7 (33.3)  
 No 24 (57.1) 10 (47.6) 14 (66.7)  
  1. * = For difference between Group A and Group B
  2. + = Tested as a continuous variable
  3. a = Two sample t-test
  4. b = Mann Whitney U-test
  5. c = Likelihood Ratio
  6. d = Fishers’ exact test
  7. e = Pearson Chi-Square test