Brief report
The use of hormonal contraceptive agents and mood disorders in women

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Abstract

Background

Mood disorders are a major cause of disability in developed countries, and contraceptive agents among the most widely used medications. The relationship between contraceptive agents and mood is unclear. The aim of this study was therefore to investigate the association between current contraception use and mood disorders in a random population-based sample of women.

Methods

This study examined epidemiological data obtained from 498 women aged 20–50 year participating in the Geelong Osteoporosis Study (GOS). Mood disorders were diagnosed using a clinical interview (SCID-I/NP) and information on medication use and other lifestyle factors were documented.

Results

After adjusting for age and socioeconomic status (SES), women taking progestin-only contraceptive agents had an increased likelihood of a current mood disorder (OR 3.0 95%CI: 1.1–7.8, p = 0.03). In contrast, women taking combined contraceptive agents had a decreased likelihood of a current mood disorder, adjusting this for age and SES (OR 0.3 95%CI: 0.1, 0.9 p = 0.03). These findings were not explained by weight, physical activity level, past depression, number of medical conditions or cigarette smoking.

Limitations

This study is cross-sectional, which precludes any determination regarding the direction of the relationships.

Conclusions

These data suggest a protective effect of the combined contraceptive pill, and a deleterious effect of progestin only agents in regards to mood disorders.

Introduction

Mood disorders are highly prevalent. The lifetime prevalence in Australian women has been estimated to be approximately 30% (Williams et al., 2010). Contraceptive agents are additionally widely used, with a recent article reporting that 58.9% of women residing in Sweden between the age of 16 and 31 use contraceptive agents (Wirehn et al., 2010). A similar prevalence has been reported in Australia (Duke et al., 2007). With a high risk of both depression and usage of contraceptive agents, it is important to know if there is relationship between the two.

There are many different contraceptive agents available. Combined contraceptive agents containing both estrogen and progestin and progestin-only agents, are the two major categories. Hormonal contraceptive agents are commonly used in birth control and cycle control, are effective, and also easy to use (Wirehn et al., 2010).

In 1970 Brenda Herzberg wrote that “Depression is a known side-effect of oral contraceptive therapy”. However, recent studies have delivered an ambiguous pattern of results. While a review article concluded that there are some psychological benefits of estrogen (Studd and Panay, 2004), other studies describe no clear association between hormonal contraception and mental disorders (Duke et al., 2007, Robinson et al., 2004). From this, it is evident that more studies are needed, in particular to determine whether relationships differ according to type of contraceptive agent used. Earlier studies have not investigated both combined and progestin only contraceptives, investigated the relationships within large randomly selected population based samples of women, included a wide range of likely confounding variables and used valid psychiatric interviews to determine mood disorders. Therefore, the aim of this study was to investigate the association between contraception use and current mood disorders in a representative population-based sample of women.

Section snippets

Participants

This study examined data obtained from women participating in the Geelong Osteoporosis Study (GOS), a large population-based study designed to investigate the epidemiology of osteoporosis, and other health disorders. Originally 1494 women (participation of 77.1%) were randomly recruited from the electoral rolls for the Barwon Statistical Division (south-eastern Australia) between 1994 and 1997 and have since been prospectively followed for a decade (retention 82.1%) (Pasco, 2011).

Of those who

Results

In this sample, 40 (8%) women were diagnosed with a current mood disorder according to the SCID-I/NP. Of this group, 8 (20%) were identified with bipolar disorder, 20 (50%) with MDD, 4 (10%) with minor depression, 7 (17.5%) with dysthymia, and 1 (2.5%) with both MDD and dysthymia. Characteristics of those with and without a current mood disorder are given in Table 1. Those with a current mood disorder were more inactive, had a significantly higher number of medical conditions during the past

Discussion

In this cross-sectional, population-based study of women, we report that current progestin-only contraceptive users had a three fold increased risk of a current mood disorder, compared to non-progestin users. In contrast, those currently using combined contraceptive agents were at decreased risk of a current mood disorder compared to non users. These associations were independent of sociodemographic characteristics, medical conditions, medication use and other lifestyle factors.

In one of the

Conclusion

In conclusion, this study suggests that women taking progestin-only contraceptive agents have an increased likelihood of current mood disorders, whereas the use of combined contraceptive agents appeared protective against these disorders. Because of the potential adverse effect progestin-only agents have on current mood, caution should be taken when prescribing these agents to women. If clinically indicated, the combined contraceptive agents appear preferable in terms of mood endpoints.

Role of funding source

The funding providers played no role in the design or conduct of the study; collection, management, analysis, and interpretation of the data; or in preparation, review, or approval of the manuscript.

Conflict of interest

Gjertrud Svendal has no conflicts of interest, including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript.

Lana Williams has received Grant/Research support from Eli Lilly, Pfizer, The University of Melbourne, Deakin University and the NHMRC.

Julie Pasco has received speaker fees from Amgen, Eli Lilly and Sanofi-Aventis and funding from the Geelong Region Medical Research Foundation, Barwon Health, Perpetual

Acknowledgments

The study was funded by the National Health and Medical Research Council of Australia (NHMRC).

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