Tolerance and Effectiveness of Forced and Prolonged Smoking Cessation Among French Submariners.

OBJECTIVES: This study investigates nicotine withdrawal symptoms and resumption rates of tobacco abuse among French submariners during and after a 7-week mission without using tobacco. METHODS: A prospective study was conducted in 2010 during two missions aboard nuclear-powered ballistic missile submarines. Over a 6-month follow-up, the study subjects completed five standardized questionnaires (Fagerström test, Hospital Anxiety Depression, and the Minnesota Nicotine Withdrawal Scale). RESULTS: Out of 222 prospective study subjects, 168 were included, 52 of whom were smokers. For 84.9% of the smokers, the Fagerström test score was lower than 2 (no dependency). Additionally, 92% of the smokers did not experience withdrawal symptoms following an abrupt and mandatory cessation of cigarette smoking. Two-thirds of the smokers resumed their addiction within 2 months, 78% of whom did so the first day they had the opportunity. CONCLUSIONS: In the physically and mentally constraining environment of submarines, the behavioral component of cigarette dependency largely dominates over the psychological and physical components of nicotine dependence. This phenomenon occurs because the behavioral component of addiction is the source of smoking resumption and, therefore, must be better addressed to achieve sustained withdrawal.

Post-traumatic stress disorder after a submarine accident.

INTRODUCTION: Although submarine accidents occur rarely, they sometimes result in many casualties. Although there are numerous reports on behavioral health consequences following surface vessel accidents, few studies have focused on these issues in the unique context of submarines. This paper reviews the history of significant acknowledged submarine accidents and reports the results of a behavioral health assessment following one recent accident. METHODS: In 2007, a French nuclear-powered submarine (SNA Rubis) suffered a collision during a diving exercise off Toulon, France. All of the crew were individually assessed by a psychiatric team following the event for defusing. A follow-up assessment by auto-questionnaire was only conducted 8 mo after the accident using an anonymous subjective survey tool, the French version of the post-traumatic checklist scale (PCLS). RESULTS: Of the 50 male crew, 48 (average age 28.8 +/- 4.3 yr) completed the questionnaire. Most of the crew (95.8%) had talked about the accident with close relations or work colleagues, but only three discussed it with a doctor. Median PCLS score was 19 (range 17-45); 83.3% of the crew had scores < or = 29; one subject met the criteria for PTSD. DISCUSSION: Whether or not PTSD is an occupational hazard in submariners, this report highlights the difficulties in conducting behavioral health follow-up after serious accidents.

Physiological and psychological effects of escape from a sunken submarine on shore and at sea.

INTRODUCTION: The stress effects induced by diverse military scenarios are usually studied under tightly controlled conditions, while only limited research has addressed realistic scenarios. This study was designed to compare the effects of two levels of realism in stressful training for escape from a sunken submarine. METHODS: Thirteen qualified submariners served as subjects. All had previously participated in underwater escape training using a simulated submarine in a land-based tank submerged at a depth of 6 m; for this study, they repeated the simulator escape, following which six of them executed escape from an actual submarine lying at a depth of 30 m on the sea floor. The men were studied before the exercises, immediately after surfacing, and 2 h later. Measured variables included sympathovagal balance, salivary cortisol, perceived mood, and sleep, as well as short-term and declarative memory. RESULTS: Compared to the simulator exercise in the tank, the escape at sea showed the following significant differences: 1) higher salivary cortisol values (6.33 +/- 3.9 nmol x L(-1) on shore and 13.38 +/- 7.5 nmol x L(-1) at sea); 2) greater adverse changes in mood, including vigor, tension, and ability to fall asleep; and 3) impairment in declarative memory. Responses were found to differ further for the five submariners who had prior experience of accident or injury while at sea. CONCLUSION: The psychophysiological and cognitive effects of military exercises may be influenced by the realism of conditions and by prior exposure to life-threatening situations.