highly significantp ≤ 0.001
A two-tailed t-test for independent samples showed a highly significant difference between the subjects with PT and those without in terms of the total exposure to tobacco smoke (p ≤ 0.001).
A two-tailed t-test for independent samples showed a highly significant difference between the subjects with PT and those without in terms of the total exposure to tobacco smoke (p ≤ 0.001).