While the change in specialty choice was large for both sexes, the differences between the specialty preferences of women and men over the time period examined were relatively small. Most of the variability in preferences was attributable to the interaction between time and specialty choice (χ2 = 3,424, 104 df, p < .0001) as opposed to sex and specialty choice. In addition, the three-way interaction among sex, specialty choice, and time was significant but explained much less of the change (χ2 = 202, 104 df, p < .0001). In other words, differences in preferences of women and men do not explain nearly as much of the variability in time in specialty choice as do changes over time in preferences common to both sexes.
As Figure 1 shows graphically, from 1996 to 2003 both women and men increasingly chose specialties with controllable lifestyles, and men consistently chose specialties with controllable lifestyles at a higher proportion than did women. The proportion of women choosing controllable lifestyle specialties rose from 18% in 1996 to 36% in 2003. By comparison, over the same time period, the proportion of men choosing controllable lifestyle specialties rose from 28% to 45%. The differences between women and men with respect to controllable lifestyle as an explanation for the change in preferences over time were much smaller (χ2 for differences in changes = 12, 1 df, p = .0005) than were the changes common to both sexes (χ2 for common changes = 920, 1 df, p < .0001).
The log-linear model demonstrated that controllable lifestyle alone explained 58% of the changes in specialty choice from 1996 to 2003 for women and 42% of the change for men. After controlling for income, work hours, and years of residency, controllable lifestyle explained 41% of the changes in specialty choice for women and 45% for men.
Income explained part of the changes in specialty choice for women and men but to a smaller extent than did controllable lifestyle. By itself, income explained 22% of the changes in specialty choice for women and 21% of the changes for men. After controlling for controllable lifestyle, work hours, and years of residency, income explained 1% of the changes in specialty choice for women and 4% of the changes for men.
When the four primary care specialties were eliminated from the data, controllable lifestyle remained a significant explanatory variable for the changes in specialty choice. After controlling for income, controllable lifestyle explained 33% of the changes in preference among the remaining specialties for men and women combined. This result is in comparison to the 41% and 45% values reported above for all 16 specialties (including primary care).
By all measures examined, controllable lifestyle is an increasingly important factor in the specialty choices of both women and men. The similarities in specialty choice trends between women and men were striking, and the results of the statistical analyses demonstrate that the differences between the specialty choices of women and men were very small relative to their similarities. Thus, the specialty preferences of female medical students alone were insufficient to explain the broader trend toward controllable lifestyle specialties, and alternative explanations must be sought.
One possible explanation of this finding is that the reward structure in medicine has changed. A model of physician satisfaction holds that a physician’s happiness (or utility, in economic terms) is a function of income, practice autonomy, and leisure.19 The recent growth of managed care has retarded the growth of physicians’ income19 and decreased physicians’ perceptions of professional autonomy.19,20 After decades of significant growth in physicians’ income,21 physicians’ real income (adjusted for inflation) from 1990 to 2000 grew by only 2%.22 With constraints on income and physicians’ autonomy, future physicians may be looking to lifestyle to maximize their professional satisfaction.
While changes in the medical profession may be an important factor in the trend toward specialties with controllable lifestyles, broader societal factors may have more influence. The last half century has seen a “massive movement” of women into the paid labor force23 that may be affecting the labor preferences of not only women but also men.
The large movement of women into the paid labor force has dramatically changed households and the family structure.23 A growing body of social science research suggests that one element of that change is the role of fathers.23,24 While the involvement of fathers in childrearing and housework remains limited relative to the involvement of mothers, it has increased in recent years23 as fathers are increasingly expected to be more involved in child-rearing.24
Another result of the higher participation of women in the paid labor force is an increase in time spent at work for married couples. In 1970, the average number of hours worked per week by nonfarm married couples was 52.5 hours. By 2000, the average soared 20% to 63.1 hour.25 The effect of more time spent at work is less time available for leisure or avocational pursuits, including parenting.
As a consequence of these changes in the labor force, achieving a “balanced” lifestyle between work and leisure is increasingly in demand among women and men. A survey of college students found that “achieving a balanced lifestyle (and) having a rewarding life outside of work”26, p.6 was a top career goal, and a study found individuals aged 26–40 years wanted more time to devote to life outside of work.27 A study published in 2002 found that 74% of men would rather have had a “daddy-track” job than a “fast-track” job.24 The desire for a balanced lifestyle is widespread in business,28 engineering,29 and the military.30 This same desire for a balanced or controllable lifestyle on the part of women and men may explain in part the trend toward controllable lifestyle specialties among female and male medical students.
Our results also demonstrate that while the proportion of women and men choosing specialties with controllable lifestyles grew steadily from 1996 to 2003, women chose specialties with uncontrollable lifestyles in greater proportion than did men. Certain specialties with uncontrollable lifestyles attracted women in large proportions. For example, in 2003, 70% of graduating medical students who chose pediatrics were women, as were 80% who chose obstetrics and gynecology. The factors that make pediatrics and obstetrics–gynecology more attractive to women despite their perceived uncontrollable lifestyles are uncertain and likely extend well beyond lifestyle considerations. Researchers have suggested that women have not entered other uncontrollable lifestyle specialties, such as the surgical specialties, in part due to the lack of available role models10 and perceptions of male bias.31
The overall trend toward lifestyle considerations in medicine is likely to evolve in the future. The broader forces working in medicine and society may also influence later decisions, such as which fellowships are selected, whether academics and research are pursued, and how physicians structure their practices. Additional research will be needed to evaluate these issues to help develop educational and workforce policies that address the lifestyle needs of physicians.
Our study had limitations. Chiefly, we dichotomously assigned selected specialties to controllable or uncontrollable lifestyles, which at its roots is subjective.1,3,32 The classification is an oversimplification as lifestyle among and within the specialties is highly variable (e.g., an orthopedist specializing in shoulder surgery may have a more controllable lifestyle than an anesthesiologist covering a critical care service) and does not necessarily reflect recent changes to the structure of practice that influence lifestyle (e.g., the growth of group practices and the emergence of hospitalists). Moreover, medical students’ choices are based on their perceptions of specialties and not necessarily reality. Despite these and other limitations, research does support the differentiation of specialties based on lifestyle. Schwartz and colleagues3 have shown that students choosing a specialty with a controllable lifestyle placed more emphasis on perceived lifestyle factors, such as number of work hours, perceived number of call nights, and adequate time for pursuit of avocational activities, than those who did not choose a specialty with a controllable lifestyle.
Although the classification of specialties (orthopedics is surgical and therefore uncontrollable) has a subjective component, multiple studies have validated the lifestyle designation used by Schwartz and colleagues.3 For example, recent research has noted that an medical students’ increased emphasis on lifestyle factors has led to declining interest in the surgical fields.5,33 In addition, a study of students’ career choices at the University of Florida found that the percentage of graduating students entering a surgical residency was declining and concluded that “lifestyle issues are increasingly important in student career decisions.”33 ,p.53 The Liaison Committee of Obstetrics and Gynecology, in response to the decreasing number of U.S. applicants, found that medical students were looking for “areas of medicine that provided a better lifestyle following graduation.”34 ,p.490 Lifestyle considerations have become so central to specialty choice that U.S. medical students have nicknamed “lifestyle” specialties the “E-ROAD,” an acronym for emergency medicine, radiology, ophthalmology, anesthesiology, and dermatology.34,35
Another study limitation was our reliance on GQ data to determine the specialty choices of women and men. While recent response rates have been high, the response rates in earlier years were lower. These data are thus subject to response bias and additionally may not reflect the actual specialty choices of medical students in all cases. Moreover, the data reflect the likely final choice of graduating medical students and not necessarily their first preference of specialty.
Notwithstanding these limitations, in our study we found that the recent trend toward specialties with controllable lifestyles cannot be explained by the unique preferences of women. Rather, both women and men from 1996 to 2003 increasingly chose specialties with controllable lifestyles, and the differences between their trends were very small. Changing dynamics in medicine and the increased participation of women in the paid labor force may be driving the trend toward controllable lifestyle specialties. Further research is required to investigate these relationships and their potentially broad implications for the future of medicine.
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