Table 3

Exposure to tobacco smoke pollution in smoker and non-smoker homes before (part 1) and after (part 2) occupants move

Part 1: original occupants, N mean (95% CI)Part 2: new non-smoker occupants, N mean (95% CI)
Urine cotinine, ng/ml
 All non-smoker homes50 0.15 (0.09 to 0.21)13 0.13* (0.00 to 0.27)
 All smoker homes31 5.42 (3.88 to 7.46)20 0.45* (0.13 to 0.86)
 Same non-smoker homes13 0.14 (0.00 to 0.29)13 0.13† (0.00 to 0.27)
 Same smoker homes5 3.66 (1.49 to 7.70)5 0.61† (0.00 to 2.26)
Finger nicotine, ng/wipe
 All non-smoker homes50 0.47 (0.04 to 1.08)11 0.75‡ (0.00 to 3.06)
 All smoker homes91 660.21 (441.58 to 986.84)19 5.19‡ (0.81 to 20.12)
 Same non-smoker homes11 1.35 (0.00 to 8.02)11 0.75§ (0.00 to 3.06)
 Same smoker homes18 803.85 (387.84 to 1664.96)18 5.85§ (0.90 to 23.72)
Reported exposure, cigarettes/week
 All non-smoker homes50 012 0
 All smoker homes31 14.19 (7.16 to 27.28)20 0.40 (0.00 to 1.15)
 Same non-smoker homes12 012 0
 Same smoker homes5 18.49 (0.10 to 343.13)5 1.52 (0.00 to 20.01)

  • ↵* p=0.0344 (one sided) part 2 smoker versus part 2 non-smoker homes.

  • ↵† p=0.1176 (one sided) part 2 smoker versus part 2 non-smoker homes.

  • ↵‡ p=0.0402 (one sided) part 2 smoker versus part 2 non-smoker homes.

  • ↵§ p=0.0339 (one sided) part 2 smoker versus part 2 non-smoker homes.