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Table 1 Baseline characteristics for intervention (Plancha) and control (open fire) groups.

From: Self-rated health among Mayan women participating in a randomised intervention trial reducing indoor air pollution in Guatemala

  PLANCHA OPEN FIRE
Number of women 89 91
Characteristics of the women:   
Mean age in years (SD) 27.6 (7.7) 28.3 (6.7)
Not attended to school (%) 32 (36.0) 36 (39.6)
Pregnant at baseline 62 (69.7) 62 (68.1)
Mean number of children < 12 years (SD) 3.7 (1.9) 3.8 (1.5)
Smokes (%) 0 (0.0) 0 (0.0)
Cough while cooking (%)a 59 (66.3) 61 (67.0)
Headache while cooking (%)b 64 (71.9) 71 (78.0)
Sore eyes while cooking (%)c 78 (87.6) 78 (85.7)
Back pain while cooking (%) d 54 (60.7) 60 (65.9)
Household characteristics:   
Wood as main fuel (%) 89 (100) 91 (100)
Cooking area in a separate structure (%) 67 (75.3) 68 (85.0)
Relative smokes inside (%) 17 (19.1) 22 (24.2)
Mean number cigarettes husband (SD) 1.2 (0.4) 1.1 (0.2)
Kitchen separate from bedroom (%) 70 (78.7) 79 (86.8)
Asset indexε:   
   0 8 (9.0) 15 (16.5)
   1 47 (52.8) 50 (54.9)
   2 23 (25.8) 18 (19.8)
   3 9 (10.1) 8 (8.8)
   > = 4 2 (2.2) 0 (0.0)
  1. a When you are cooking, does the smoke make you cough or irritate your throat? (yes = sometimes/always)
  2. b When you are cooking or immediately after, do you get a headache? (yes = sometimes/always)
  3. c When you are cooking, do your eyes get irritated? (yes = sometimes/always)
  4. d When you are cooking, do you get back pain? (yes = sometimes/always)
  5. e Sum of goods (radio, TV, refrigerator, bicycle, motorcycle and car) a family has. From 0 for not having any of them, to 6 for having all of them