Action to Stop Smoking in Suspected Tuberculosis (ASSIST) in Pakistan A Cluster Randomized, Controlled Trial

Siddiqi K, Khan A, Ahmad M, et al. — Tue, 07 May 2013 00:00:00 GMT

Background:

Tobacco use is responsible for a large proportion of the total disease burden from tuberculosis. Pakistan is one of the 10 high-burden countries for both tuberculosis and tobacco use.

Objective:

To assess the effectiveness of a behavioral support intervention and bupropion in achieving 6-month continuous abstinence in adult smokers with suspected pulmonary tuberculosis.

Design:

Cluster randomized, controlled trial. (Current Controlled Trials: ISRCTN08829879)

Setting:

Health centers in the Jhang and Sargodha districts in Pakistan.

Patients:

1955 adult smokers with suspected tuberculosis.

Intervention:

Health centers were randomly assigned to provide 2 brief behavioral support sessions (BSS), BSS plus 7 weeks of bupropion therapy (BSS+), or usual care.

Measurements:

The primary end point was continuous abstinence at 6 months after the quit date and was determined by carbon monoxide levels in patients. Secondary end points were point abstinence at 1 and 6 months.

Results:

Both treatments led to statistically significant relative risks (RRs) for abstinence compared with usual care (RR for BSS+, 8.2 [95% CI, 3.7 to 18.2]; RR for BSS, 7.4 [CI, 3.4 to 16.4]). Equivalence between the treatments could not be established. In the BSS+ group, 275 of 606 patients (45.4% [CI, 41.4% to 49.4%]) achieved continuous abstinence compared with 254 of 620 (41.0% [CI, 37.1% to 45.0%]) in the BSS group and 52 of 615 (8.5% [CI, 6.4% to 10.9%]) in the usual care group. There was substantial heterogeneity of program effects across clusters.

Limitations:

Imbalances in the urban and rural proportions and smoking habits among treatment groups, and inability to confirm adherence to bupropion treatment and validate longer-term abstinence or the effect of smoking cessation on tuberculosis outcomes.

Conclusion:

Behavioral support alone or in combination with bupropion is effective in promoting cessation in smokers with suspected tuberculosis.

Primary Funding Source:

International Development Research Centre.

Annals of Internal Medicine: Smoking Topic Collection

Action to Stop Smoking in Suspected Tuberculosis (ASSIST) in Pakistan A Cluster Randomized, Controlled Trial