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. 2021 Aug 25;117(3):772–783. doi: 10.1111/add.15656

TABLE 2.

Month (August–February versus April–July) × year (2018/19 versus 2019/20) interactions for smoking outcomes.

Prevalence: % (95% CI) Month × year interaction
2018/19 2019/20
August–February April–July August–February April–July OR (95% CI) P aOR (95% CI) P
Smoking prevalence 16.9 (16.2–17.5) 15.9 (15.1–16.8) 16.1 (15.4–16.7) 16.4 (15.5–17.3) 1.09 (0.97–1.23) 0.288 1.09 (0.97–1.23) 0.288
Age 18–34 22.4 (21.1–23.8) 22.3 (20.4–24.1) 21.5 (20.2–22.9) 26.8 (24.8–28.8) 1.35 (1.12–1.62) 0.008 1.35 (1.12–1.63) 0.008
Age 35–59 17.5 (16.4–18.6) 15.8 (14.4–17.1) 16.4 (15.3–17.4) 15.5 (14.1–16.8) 1.06 (0.89–1.27) 0.759 1.06 (0.89–1.28) 0.759
Age ≥ 60 9.9 (8.9–10.9) 9.6 (8.2–10.9) 10.0 (9.0–11.0) 7.9 (6.7–9.1) 0.81 (0.61–1.06) 0.288 0.81 (0.61–1.07) 0.288
Cessation 4.0 (3.2–4.9) 3.5 (2.4–4.6) 3.9 (3.0–4.7) 10.0 (8.2–11.8) 3.16 (1.91–5.22) <0.001 3.08 (1.86–5.09) <0.001
Quit attempts 28.8 (26.9–30.8) 28.4 (25.7–31.1) 29.5 (27.5–31.5) 37.6 (34.8–40.3) 1.47 (1.18–1.84) 0.004 1.45 (1.16–1.81) 0.004
Age 18–34 32.4 (29.2–35.6) 25.2 (21.1–29.2) 32.1 (28.9–35.4) 44.9 (40.8–49.0) 2.45 (1.74–3.45) <0.001 2.48 (1.76–3.50) <0.001
Age 35–59 27.7 (24.7–30.7) 33.3 (28.8–37.7) 28.6 (25.5–31.8) 32.6 (28.3–36.9) 0.93 (0.65–1.32) 0.805 0.92 (0.65–1.32) 0.805
Age ≥ 60 22.7 (18.2–27.3) 25.3 (18.8–31.8) 25.9 (21.2–30.6) 28.3 (21.6–35.0) 0.98 (0.55–1.77) 0.952 0.96 (0.53–1.75) 0.935
Quit success 12.5 (9.7–15.2) 12.6 (8.7–16.4) 12.7 (9.9–15.4) 25.3 (21.1–29.5) 2.31 (1.34–3.99) 0.009 2.29 (1.31–3.98) 0.009
Use of evidence‐based support 53.1 (49.0–57.2) 49.2 (43.4–55.1) 53.8 (49.7–58.0) 44.8 (39.9–49.6) 0.81 (0.55–1.19) 0.499 0.94 (0.63–1.41) 0.852
Use of remote support 0.8 (0.1–1.5) 3.0 (1.0–5.0) 2.4 (1.2–3.7) 6.8 (4.4–9.3) 0.75 (0.20–2.83) 0.805 0.71 (0.19–2.73) 0.805

All data are weighted to match the adult population in England on age, social grade, region, tenure, ethnicity and working status within sex.

CI = confidence interval; OR = odds ratio; aOR = adjusted odds ratio. The aOR for smoking prevalence adjusted for trend within year (i.e. August = 1 to July = 12) and trend across years (i.e. August 2018 = 1 to July 2020 = 24). aORs for other outcomes are additionally adjusted for age, sex and social grade, region (and, for analyses of cessation, quit success and use of support, heaviness of smoking index).

White rows show results for the whole eligible sample; shaded rows show results from stratified analyses conducted where significant three‐way interactions between month, year and the indicated variable were detected.

a

Among all adults (2018/19: August–February n = 11 820, April–July n = 6592; 2019/20: August–February n = 11 892, April–July n = 6633).

b

Among past‐year smokers (2018/19: August–February n = 2055, April–July n = 1081; 2019/20: August–February n = 1961, April–July n = 1209).

c

Among past‐year smokers who made a quit attempt (2018/19: August–February n = 571, April–July n = 284; 2019/20: August–February n = 551, April–July n = 410).

c1

Prescription medication, face‐to‐face behavioural support, nicotine replacement therapy obtained over the counter, e‐cigarettes.

c2

Telephone support, websites or apps.