Figure 1. Study flow diagram. TTS indicates Tobacco Treatment Service.
Figure 2. Patient and admission characteristics associated with smoking while hospitalized, adjusted for all other factors in the generalized linear model. A, Smoked before counselor visit; B, smoked at any time during hospitalization. Longer stay is defined as counseled on day 3 or later of hospitalization (A) or total length of stay of 5 days or longer (B). NRT indicates nicotine replacement therapy.
Regan S, Viana JC, Reyen M, Rigotti NA. Prevalence and Predictors of Smoking by Inpatients During a Hospital Stay. Arch Intern Med. 2012;172(21):1670-1674. doi:10.1001/2013.jamainternmed.300
Author Affiliations: Tobacco Research and Treatment Center and Division of General Medicine, Department of Medicine, Massachusetts General Hospital (Drs Regan and Rigotti, Mr Viana, and Ms Reyen), Mongan Institute for Health Policy, Partners HealthCare (Mr Viana and Dr Rigotti), and Department of Medicine, Harvard Medical School (Drs Regan and Rigotti), Boston, Massachusetts.
Background Accredited US hospitals prohibit smoking inside hospital buildings. Patients are expected to abstain from smoking throughout their hospitalization, but how many do so is unclear. Smoking by inpatients may compromise patient safety, clinical outcomes, and hospital efficiency.
Methods We conducted an observational study of adult cigarette smokers visited by a tobacco counselor while hospitalized and reached for telephone follow-up in the 2 weeks after discharge. We assessed smoking during the hospital stay at the time of counseling for all patients and at follow-up for those reached. We used generalized linear models to estimate adjusted relative risk (ARR) for smoking while hospitalized, adjusted by patient and admission characteristics.
Results From May 1, 2007, through April 31, 2010, counselors visited 5399 smokers, of whom 14.9% had smoked between admission and the visit. Of 3555 eligible smokers who consented to follow-up, 2185 were reached. Smoking at any time during the hospitalization was reported by 18.4%, less often during winter months than the rest of the year (14.4% vs 19.7%, P = .007). Smoking at any time while hospitalized was less common among those 50 years or older (ARR, 0.74; 95% CI, 0.62-0.88), those admitted to a cardiac unit (0.64; 0.51-0.81), and those intending to quit after discharge (0.46; 0.34-0.63) and more common among those with longer stays (1.36; 1.14-1.62) and those experiencing cigarette cravings (moderate: 1.23; 1.14-1.33; severe: 1.25; 1.18-1.34). Nicotine replacement therapy ordered the day of admission was associated with less smoking before the counselor's visit (ARR, 0.83; 95% CI, 0.72-0.96) but not for the entire hospital stay.
Conclusions Nearly one-fifth of smokers admitted to a smoke-free hospital smoked during their hospital stay. Ordering nicotine replacement therapy routinely at admission and ongoing monitoring of patients' cigarette cravings might reduce smoking among admitted patients.
The Joint Commission requires accredited US hospitals to have a policy that prohibits smoking in hospital buildings, and hospitals have nearly universally adopted smoke-free building policies.1,2 However, the requirement does not extend to the hospital campus, and in most hospitals where a campus-wide smoking ban is not in place,3 hospitalized smokers may travel outside the hospital if they wish to smoke. The fact that patients may go outdoors to smoke, especially without supervision or in inclement weather, raises safety concerns. Quality of care and hospital efficiency could be compromised if patients are not available for examinations or treatments.4 Patients who smoke during a hospitalization may experience direct negative consequences, such as delayed recovery from cardiopulmonary disease or impaired wound healing,5,6 and do not experience the immediate cardiovascular benefits of carbon monoxide elimination.7 Further, they deprive themselves of an opportunity to initiate a quit attempt in a supportive, smoke-free environment.
Few recent studies8- 11 have evaluated patients' behavior under smoke-free building policies except in hospitals outside the United States or among special populations. Two studies12,13 in US hospitals, both completed more than 10 years ago, reported that one-quarter of smokers admitted to a general hospital smoked during their stay. Since then, the proportion of smokers who smoke during a hospital stay may have decreased as a result of declining population smoking prevalence,14 clinical practice guidelines recommending the use of nicotine replacement therapy (NRT) to relieve nicotine withdrawal symptoms,15 and increasingly common hospital smoking bans.
We conducted an observational study of smokers admitted to a large urban teaching hospital with a smoke-free building policy. Our aim was to assess the proportion of smokers who continue to smoke during their admission and to identify patient and admission characteristics, including NRT use, associated with smoking while hospitalized (SWH).
The study was conducted at Massachusetts General Hospital (MGH), a 900-bed, urban teaching hospital affiliated with Harvard Medical School and was approved by the Institutional Review Board of Partners Healthcare System, of which MGH is a member. Smoking is banned in all indoor areas and on the outdoor campus at MGH except in 2 outdoor shelters, which patients can use. Patients' smoking status is routinely recorded via admission and postoperative order templates in the computerized physician order entry system used by the medical, surgical, neurology, and gynecology services. The templates also facilitate the ordering of NRT. The system generates an automatic electronic referral to the MGH Tobacco Treatment Service (TTS). In addition, staff may make referrals at any time during an admission electronically or by telephone. The TTS counselors attempt to visit all referred smokers at the bedside to assist in managing nicotine withdrawal. Pharmacotherapy, typically NRT, is available to admitted smokers to manage cravings. All patients receive brief advice to quit (≤5 minutes). Those considering quitting receive cessation counseling (averaging 20 minutes) using motivational interviewing and covering behavioral strategies and use of medication to remain abstinent. Counselors may recommend varenicline, bupropion hydrochloride, or NRT to patients who are committed to remaining abstinent after discharge. Use of the prescription medications may be initiated during the admission, but, unlike NRT, their effect on cravings is typically delayed and unlikely to reduce the urge to smoke during the stay.
Patients were enrolled in the study during the 3-year period from May 1, 2007, through April 31, 2010. Enrolled patients were contacted by telephone in the 2 weeks after discharge to determine whether they had smoked during their admission. Patients were eligible for the study if they received counseling from a TTS counselor during their stay, reported having smoked cigarettes within the month before admission, had a telephone where they could be reached, were discharged to home, and had no communication barriers (eg, deafness or non–English-speaking) or health issues precluding participation (eg, cancer or palliative care). Counselors asked eligible patients to consent to participation at the end of the counseling session.
The TTS counselors recorded patients' mean daily cigarette consumption (cigarettes per day) in the month before admission when smoking normally (ie, not too ill to smoke or cutting down temporarily for a planned admission), elapsed time since last cigarette smoked, cigarette craving (categorized as none, slight, mild, moderate, or severe), and intention to smoke after discharge (“I will quit,” “I will try to quit,” “I do not know,” or “I do not plan to quit”) at the time of their inpatient visit. At the postdischarge call, patients were asked if they had smoked any cigarettes during their hospital stay. Patients' age, sex, date of admission, admitting service, length of stay (LOS), and pharmacy orders for NRT were obtained from hospital records.
The outcome of interest, SWH, was determined from data collected at the TTS counselor visit and during the postdischarge telephone call. Smoking early in the hospitalization (early SWH) was assessed at the TTS visit by comparing the patient's report of the time elapsed since their last cigarette to the time elapsed between the visit and hospital admission. Patients who last smoked on the day of admission were not considered to have smoked while hospitalized because it could not be determined whether smoking occurred after the admission began. Smoking at any time during hospitalization was assessed in a follow-up telephone survey 2 weeks after discharge. Patients were defined as having smoked at any time during the admission if (1) they reported during their inpatient assessment that their last cigarette was smoked on day 2 or later of their hospital stay or (2) they reported SWH at the follow-up assessment.
We calculated the prevalence and 95% CIs of early SWH for all patients counseled by the TTS and smoking at any time during the admission for those reached for follow-up. Logistic regression was used to test for linear trends in prevalence by study year. Characteristics of patients who did and did not smoke in the hospital were compared in bivariate analyses using t tests and Wilcoxon rank sum tests for continuous variables and χ2 tests for categorical variables. We used generalized linear models to explore associations between patient and admission characteristics and early SWH and smoking at any time during the admission. The models used a Poisson distribution, log link function, and robust SEs16 and included age (<50 years vs ≥50 years), sex, baseline smoking level (<10 vs ≥10 cigarettes per day), cigarette craving (categorized as slight, mild, moderate, or severe, with none as the reference group), admission service (cardiac vs noncardiac), intention to quit after discharge (“I will quit,” “I will try to quit,” or “I don't know,” with “I do not plan to quit” as the reference group), and NRT ordered on admission. We included a term for the winter months (December, January, and February) to assess whether colder outdoor temperatures might discourage patients from venturing outside to smoke. The models also included terms for duration of hospitalization at the time of assessing SWH, dichotomized at the median. In the model predicting smoking at any time during the stay, this term was based on total LOS (<5 vs ≥5 days). The model predicting early SWH included a term for days between admission and the visit (<3 vs ≥3 days). We present relative risks adjusted for all terms in the models (ARR) and 95% CIs. Results were evaluated using a criterion of P < .05 for statistical significance. All analyses were conducted using Stata statistical software (Stata Corp).17
During the study period, 171 879 patients were admitted for an overnight stay, of whom 63 899 were admitted using a template that prompted smoking status identification. Smoking status was identified for 54 166 (84.8%), of whom 11 439 (21.1%) were smokers and were automatically referred to the TTS. A total of 12 771 referrals were received by the TTS, including 1332 additional consult requests. Counselors were able to see 8358 patients (65.4%): 2361 received withdrawal assistance and brief advice only, 598 were not current cigarette smokers, and 5399 received cessation counseling (Figure 1). Of the smokers counseled by the TTS, 4295 of 5399 (79.6%) were eligible for follow-up and 3555 of 4295 (82.8%) consented. The follow-up response rate was 2185 of 3555 (61.5%) of those consenting to follow-up and 2185 of 4295 (50.9%) of those eligible. Patients had a mean age of 53 years, and most (58.2%) were male (Table). The median LOS was 5 days, and the median day of stay for the TTS visit was day 3. Most patients (62.4%) received NRT during hospitalization, and one-third received it on the first day of their stay. The NRT orders were more common among those smoking 10 cigarettes per day or more on admission (36.0% vs 21.9%, P < .001) and throughout the stay (68.1% vs 42.9%, P < .001).
At the time of the TTS visit, 14.9% (95% CI. 14.0%-15.9%) of patients reported smoking since hospital admission. Among those reached at follow-up, 18.4% (95% CI, 16.8%-20.0%) reported smoking at any time during their admission. During the 3-year study period, prevalence of smoking before the TTS visit decreased slightly from 16.0% (95% CI, 14.3%-17.7%) to 14.9% (13.3%-16.5%) in year 2 and 13.8% (12.1%-15.5%) in year 3, but the trend did not reach statistical significance (P = .08), and no similar reduction was observed among the patients reached for follow-up (Figure 1). Patients admitted during the winter months (December, January, and February) were less likely to smoke at any time during their admission than those admitted during the rest of the year (14.4% vs 19.7%, P = .007).
The Table presents characteristics of patients who had and had not smoked by the time of the TTS visit and of patients who were reached for follow-up who did and did not smoke at any time during the hospitalization. Those who reported smoking early in the admission were younger, smoked more cigarettes per day, reported more severe cravings, were less likely to report they will quit or try to quit on discharge, had longer hospital stays, were less likely to be admitted to the cardiac service, and were more likely to receive NRT during the stay than those who had abstained up to the TTS visit. Among those eligible for follow-up, patients who were reached for follow-up were less likely to have reported smoking at the time of the counseling session than telephone nonrespondents (12.6% vs 16.3%, P < .001). All characteristics associated with having smoked at the time of the TTS visit were similarly associated with smoking at any time during the stay.
The generalized linear models are presented in Figure 2. A total of 207 patients (3.8%) were missing a data element and were excluded from these analyses. Early SWH (Figure 2A) was more common among heavier smokers (ARR, 1.43; 95% CI, 1.17-1.73) and those with stronger cravings (moderate: 1.22; 1.15-1.29; severe: 1.15; 1.09-1.21) and less common among those 50 years or older (0.68; 0.60-0.78), intending to quit (will try to quit: 0.85; 0.78-0.92; will quit: 0.46; 0.37-0.58), admitted to the cardiac service (0.80; 0.67-0.96), and receiving NRT the day of admission (0.83; 0.72-0.96). Patients who had reached day 3 or later of their stay before being seen by the TTS (longer stay) were more than twice as likely to report having smoked than those seen earlier in the stay (ARR, 2.39; 95% CI, 2.06-2.78).
At any point during hospitalization (Figure 2B), SWH was more frequent in those with stronger cravings (moderate: ARR, 1.23; 95% CI, 1.14-1.33; severe: 1.25; 1.18-1.34) and longer stays (1.36; 1.14-1.62) and less frequent in older patients (0.74; 0.62-0.88), those who intend to quit (will try to quit: 0.81; 0.71-0.91; will quit: 0.46; 0.34-0.63), and those admitted to the cardiac service (0.64; 0.51-0.81). In contrast to early SWH, SWH at any point was less frequent during the winter months (ARR, 0.76; 95% CI, 0.61-0.96) but was not associated with receiving NRT on admission or heavy smoking.
In a large sample of smokers admitted to a smoke-free hospital from 2007 to 2010, 18.4% reported having smoked during their hospital stay. Most smokers received NRT. In multivariate models, patients were more likely to report having smoked while hospitalized if they were younger, had more severe cigarette cravings, did not report planning to quit, had longer hospital stays, and were not admitted to a cardiac unit. Smoking during the first few days of the stay was more common among heavy smokers in both unadjusted and adjusted analyses. Receipt of NRT on admission was associated with a lower rate of smoking early in the stay; however, this effect was not significant for smoking at any point during the hospitalization.
Our results indicate a decrease in the rate of SWH when compared with a previous study13 of inpatient smokers at the same hospital, which found that 25% smoked during their stay in 1995. The difference may be partially explained by study design: the earlier study included all smokers admitted during the study period, whereas the current study is limited to patients receiving cessation counseling. Patients unwilling to discuss cessation were thus excluded, and our results suggest those uninterested in quitting may be more likely to smoke while hospitalized.
The rate of NRT use among inpatients at this hospital increased substantially during this period from 5% in 199518 to 62% in the current study, and this change may be responsible in part for the decrease in SWH. Our finding that NRT was associated with less smoking before the TTS visit but not when patients could report on their entire hospitalization suggests that NRT might have delayed but did not prevent smoking. Patients with longer stays might require increasing nicotine dose or supplementation of patch with shorter-acting forms of NRT (eg, gum or lozenge).
Admitting staff were more likely to order NRT on admission for heavier smokers, which may reflect a reasonable expectation that these patients were especially likely to experience withdrawal. We found that the intensity of cigarette cravings was more strongly associated with SWH than the number of cigarettes smoked per day. It may be difficult to predict the intensity of cravings during an admission from preadmission smoking level due to individual variability in response to illness and the hospital environment.19 Routine ongoing assessment of cigarette craving, although more time consuming, might be a more effective means of identifying patients who will have difficulty remaining abstinent during their hospital stay and assist in titrating nicotine dose for patients already receiving NRT.
Extending hospital smoking bans to encompass all outdoor areas may discourage inpatients from smoking, and such bans are increasingly common. As of February 2008, 45% of hospitals nationwide reported implementing campus-wide smoke-free policies.3 However, several studies20,21 have found campus-wide bans not sufficient to prevent smoking by inpatients. Staff reluctance to confront patients and visitors has been cited as an obstacle to enforcement.21- 23 A clear policy prohibiting patients from leaving the hospital to smoke may be necessary to prevent smoking by inpatients.
This study has several limitations. It was an observational study conducted in a single urban hospital in Massachusetts. The results may be influenced by the state's low prevalence of smoking or its weather patterns or the physical setting of the hospital and its outdoor smoking shelters. Because discharge diagnoses were not available, we were not able to account for seasonal changes in case mix that might explain the observed reduction in smoking during the winter. Our data on NRT orders after admission do not allow us to determine reliably whether NRT was first offered before or after the patient left to smoke. The estimated rates of SWH may be biased downward for 2 reasons. First, we based our estimate on patient self-report, which is subject to patient reluctance to disclose or failure to recall smoking as an inpatient. Second, our estimate of SWH relied in part on telephone follow-up. The follow-up reached less than half of those counseled (40% were eligible, consented, and responded) and may have been subject to nonresponse bias: respondents differed from nonrespondents in that they were less likely to have reported smoking by the time of the TTS counseling visit. Because our multivariate analysis was exploratory and well powered by our large sample size, the results should be interpreted with caution.
The 1992 Joint Commission regulations requiring hospitals to prohibit smoking in indoor areas led to the adoption of smoke-free policies in hospitals nationwide. These policies in turn encouraged temporary abstinence among a large number of smokers. Nonetheless, in 2007-2010, nearly 1 in 5 smokers admitted to one smoke-free hospital smoked during their hospital stay. This proportion is not much lower than that reported a decade ago, despite a hospital policy that now limits smoking to 2 outdoor shelters and the substantial use of NRT to treat nicotine withdrawal symptoms in hospitalized smokers. Assessment of cigarette cravings, especially among younger smokers and those who do not plan to quit after discharge, could identify high-risk patients. The routine order of NRT on admission and the expansion of smoke-free policies to cover the entire hospital campus are 2 strategies that might decrease the proportion of smokers who smoke while hospitalized. This could improve patient safety, hospital efficiency, and clinical outcomes for hospitalized smokers.
Correspondence: Susan Regan, PhD, Division of General Medicine, Massachusetts General Hospital, 50 Staniford St, Ninth Floor, Boston, MA 02114 (firstname.lastname@example.org).
Accepted for Publication: July 24, 2012.
Published Online: November 5, 2012. doi:10.1001/2013.jamainternmed.300
Author Contributions: All authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Regan. Acquisition of data: Reyen. Analysis and interpretation of data: Regan, Viana, and Rigotti. Drafting of the manuscript: Regan and Viana. Critical revision of the manuscript for important intellectual content: Regan, Reyen, and Rigotti. Statistical analysis: Regan. Obtained funding: Rigotti. Administrative, technical, and material support: Reyen. Study supervision: Rigotti.
Conflict of Interest Disclosures: Dr Rigotti reported having received a research grant from Nabi Biopharmaceuticals, having been an unpaid consultant for Pfızer Inc and Alere Wellbeing Inc, and having received royalties for UpToDate Inc for smoking cessation activities.
Funding/Support: This project was supported by grants RC1-HL099668-01 and K24-HL08880-10 from the National Heart Lung and Blood Institute.
Previous Presentation: The data were presented in part in abstract form at the 2011 New England Regional Meeting of the Society of General Internal Medicine; March 4, 2011; Boston, Massachusetts.