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. 2015 Mar 18;10(3):e0118500. doi: 10.1371/journal.pone.0118500

Table 5. Smoking status of the participants.

Male (n = 288) Female (n = 547)
Mean(SD) 2001 2010 P 2001 2010 P
CPD 13.1 (8.3) 13.0 (9.4) 0.771 9.4 (9.2) 9.7 (8.3) 0.792
SI 24.0 (9.1) 25.4 (9.4) 0.017 24.7 (10.0) 26.2 (10.4) 0.140
Years of smoking 33.6 (11.8) 37.3 (14.3) <0.001 31.8 (13.0) 37.0 (14.6) 0.001
CPD (P) 12.5 (7.5) 9.5 (8.3) 0.182 12.7 (7.8) 13.3 (13.6) 0.643
Years of passive smoking 19.6 (11.7) 22.8 (13.3) 0.164 30.4 (13.7) 35.3 (15.7) 0.002
% (95% CI)
Active smoking status <0.001 <0.001
    Current 26.0 (20.9–31.1) 16.3 (12.0–20.6) <0.001 7.9 (5.6–10.1) 4.0 (2.4–5.7) <0.001
    Former 30.9 (25.5–36.3) 40.6 (34.9–46.3) <0.001 4.8 (3.0–6.5) 9.1 (6.7–11.6) <0.001
    Never 43.1 (37.3–48.8) 43.1 (37.3–48.8) 0.918 87.4 (84.6–90.2) 86.8 (84.0–89.7) 0.936
Current smoking prevalence
60–69 28.2 (22.2–34.2) 18.6 (13.5–23.8) <0.001 7.7 (5.3–10.0) 3.9 (2.2–5.7) <0.001
70–79 20.3 (10.2–30.4) 9.4 (2.0–16.7) <0.001 8.1 (1.1–15.0) 4.8 (0.6–10.3) 0.015
≥80 0 (0.0) 0 (0.0) 1 (50.0) 0 (0.0)
Passive smoking 18.4 (13.9–22.9) 22.6 (17.7–27.4) <0.001 35.8 (31.8–39.9) 35.1 (31.1–39.1) <0.001
60–69 20.9 (15.5–26.3) 24.6 (18.8–30.3) <0.001 36.4 (32.1–40.8) 35.0 (30.7–39.3) <0.001
70–79 10.9 (3.1–18.8) 17.2 (7.7–26.7) 0.091 29.0 (17.4–40.7) 33.9 (21.8–46.0) 0.037
≥80 0 (0.0) 0 (0.0) 2 (100.0) 2 (100.0)
Places <0.001 <0.001
    Family 12.5 (8.7–16.3) 18.8 (14.2–23.3) <0.001 34.6 (30.6–38.6) 33.1 (29.1–37.1) <0.001
    Work 5.6 (2.9–8.2) 2.8 (0.9–4.7) 0.487 1.1 (0.2–2.0) 1.1 (0.2–2.0) 0.795
    Public 0.4 (0.3–1.0) 0.7 (0.3–1.7) 0.933 0.2 (0.1–0.5) 0.9 (0.1–1.7) 0.923
Source <0.001 <0.001
    Couple 5.6 (2.9–8.2) 2.8 (0.9–4.7) <0.001 28.9 (25.1–32.7) 14.6 (11.7–17.6) <0.001
    Off-springs 6.6 (3.7–9.5) 16.7 (12.3–21.0) <0.001 4.4 (2.7–6.1) 17.7 (14.5–20.9) <0.001
    Colleagues 5.2 (2.6–7.8) 3.1 (1.1–5.2) 0.475 1.1 (0.2–2.0) 1.7 (0.6–2.7) 0.750
    Others 1.0 (0.1–2.2) 0 (0.0) 1.5 (0.5–2.5) 0.9 (0.1–1.7) 0.784

P is for 2001 vs. 2010

Data are mean (SD) for continuous values or % (95% CI) for category value

CPD = cigarettes per day

SI = age of smoking initiation.