Mobile instant messaging supported brief physical exercise intervention for smoking cessation: a community-based, cluster randomised controlled trial.

Mobile instant messaging (MIM) offers a scalable platform for delivering exercise support with minimal supervision.

移动即时消息（MIM）提供了一个可扩展的平台，用于在最小监督下提供锻炼支持。

We assessed the effectiveness of MIM-supported brief physical exercise intervention on smoking cessation.

我们评估了MIM支持的简短体育锻炼干预对戒烟效果的影响。

Methods

In this two-arm, parallel, cluster randomised controlled trial, we recruited daily smokers aged 18 years or older from 70 community sites in Hong Kong from June to October 2022.

在这项两臂、平行、群组随机对照试验中，我们从2022年6月至10月在香港的70个社区场所招募了18岁或以上的每日吸烟者。

Sites were randomised (1:1) to either the intervention group (n=492) or control group (n=539).

研究地点被随机分配（1:1），分为干预组（n=492）和对照组（n=539）。

Brief cessation advice, physical exercise instructions and MIM-based practice reminders were offered to the intervention group for 3 months.

干预组接受了为期3个月的简短戒烟建议、体育锻炼指导和基于移动即时消息（MIM）的实践提醒。

The primary outcome was biochemically validated 7-day point prevalenceabstinence (PPA) at 6 months.

主要结果是6个月时通过生化验证的7天点时吸烟率（PPA）。

Results

Of the 1031 participants (80.9% male, mean age 44.2 years), 59.8% were followed up at 6 months.

在1031名参与者（80.9%为男性，平均年龄44.2岁）中，有59.8%在6个月时进行了随访。

Biochemically validated abstinence rates at 6 months were non-significantly higher in the intervention than the control group (10.4% vs 9.1%; risk ratio (RR) 1.14, 95% CI 0.79 to 1.66, p=0.48).

干预组与对照组在6个月时生化验证的戒断率无显著差异（分别为10.4%和9.1%；风险比（RR）1.14，95%置信区间0.79至1.66，p=0.48）。

Self-reported 7-day PPA was 21.9% and 19.5%, respectively (RR 1.13, 95% CI 0.89 to 1.43, p=0.32).

自我报告的7天PPA分别为21.9%和19.5%（RR 1.13，95%置信区间0.89至1.43，p=0.32）。

Weekly practice of handgrip and elastic band exercises in the intervention group declined significantly over 6 months (from 10.3 min to 2.5 min and from 9.4 min to 0.8 min; p<0.001).

干预组在6个月内手握力和弹性带练习的周实践时间显著下降（从10.3分钟降至2.5分钟，从9.4分钟降至0.8分钟；p<0.001）。

The proportion of participants with moderate to high physical activity levels was quite similar between groups at 6 months (41.1% vs 39.9%; RR 1.05, 95% CI 0.82 to 1.35, p=0.70).

6个月时，两组之间中等到高强度体力活动水平的参与者比例相当相似（41.1%对比39.9%；相对风险1.05，95%置信区间0.82至1.35，p=0.70）。

Conclusions

MIM-supported brief physical exercise intervention did not significantly increase smoking abstinence or physical activity compared with brief cessation advice alone.

MIM支持的简短身体锻炼干预并未显著增加吸烟戒断率或身体活动量，与仅给予简短戒烟建议相比。

trial_registration_number

NCT05430451.

NCT05430451。