EFFECTS OF RELAXATION ON ANXIETY AND SALIVARY IgA LEVELS IN PUERPERAE

This experimental study aimed to evaluate the effect of relaxation techniques on anxiety levels, and the relation between anxiety and the concentration of Immunoglobulin A. The study was carried out in a maternity hospital in a city of the State of Espírito Santo, Brazil. The sample was composed of 60 puerperae. The information on the variables: age, education, marital status, type of childbirth, and parity were collected with a specific form; the trait and state of anxiety were based on the State Trait Anxiety Inventory (STAI/IDATE); and the level of salivary IgA was obtained through immunoturbidimetry. The application of the Mann-Whitney, Wilcoxon, and Pearson’s correlation statistical tests showed a significant reduction in the levels of the state of anxiety in the experimental group (p = 0.01); there was no correlation between the trait and state variables of anxiety and the salivary IgA level; both groups (experimental and control) showed trait and state of medium-intensity anxiety.


LOS EFECTOS DEL RELAJAMIENTO SOBRE EL ESTADO DE ANSIEDAD Y EN LOS NIVELES DE IgA EN LA SALIVA DE MUJERES EN PUERPERIO
Este estudio experimental tiene como objetivos evaluar los efectos de la técnica de relajamiento en los niveles de ansiedad y la relación que existe entre la ansiedad y la concentración de Inmunoglobulina A. El estudio fue realizado en una maternidad, en un municipio del Estado de Espíritu Santo, en Brasil.La muestra estaba constituida por 60 puérperas.Las informaciones referentes a las variables: edad, grado de instrucción, estado civil, tipo de parto y número de hijos, fueron recolectadas por medio de un formulario específico; el trazo y el estado de ansiedad tuvieron como base el Inventario de Ansiedad Trazo y Estado (IDATE), y el nivel de IgA de la saliva a través de la inmunoturbidimetría.La aplicación de las pruebas estadísticas Mann-Whytney, Wilcoxon y la correlación de Pearson mostraron: una disminución significativa de los niveles del estado de ansiedad en el grupo experimental (p= 0,01) y la ausencia de correlación entre las variables trazo y estado de ansiedad y el nivel de

INTRODUCTION
Maternity is an important event in a woman's life, whose body is physiologically prepared for that.
However, it is observed that this event seems to make the woman prone to emotional disorders.This may be evident, since several researchers have described a higher incidence of psychiatric disorders in the postpartum period, ranging from dysphoria and anxiety disorders to depression and puerperal psychosis (1) .
The etiology of anxiety and mood swing episodes in women in the postpartum period remains unclear.This period shows significant neuroendocrinal and psychosocial changes, and the interaction of these factors is probably responsible for the pathogenesis of the affective disorders (2) .
Anxiety is an emotional state with psychological and physiological components, being a part of human experiences, and it is responsible for the adaptation of the organism to situations of danger.
The feeling of anxiety is a common experience and may concern any human being.It affects one out of nine people, approximately (1) .
Pregnancy and childbirth are very significant events in a woman's life, and few studies address the effects of anxiety for women and babies in these periods.Studies show that nearly 30% of women have experienced some kind of anxiety disorder during their lives, and that episodes of anxiety became very frequent during pregnancy and after childbirth (3)(4) .
Furthermore, most cases of postpartum anxiety were preceded by a history of antenatal anxiety (5)   .
Studies have shown that anxiety may interfere in the concentration of IgA by the sympathetic and parasympathetic nervous systems.
The parasympathetic nervous system causes glandular vasodilatation, triggering a very abundant and diluted production of salivary secretion.However, the sympathetic nervous system causes marked vasoconstriction, responsible for the occurrence of a low salivary volume and, consequently, the dry mouth feeling (6) .
Nowadays, there is an ever-growing application of techniques that include relaxation, when trying to mitigate the stressful factors of modern life.
There have been positive results with the use of relaxation techniques in patients, such as stress reduction.In addition, there were reductions in anxiety, hostility, blood pressure, pain, nervousness, and depression (7) .
The use of music as a relaxation therapy has been used in several areas.Research with students exposed to stressing factors during an oral presentation verified that, when there was music, students' anxiety decreased, and the music increased the levels of salivary IgA (8) .Reiki is another practical intervention that has been used with the goal of bringing balance and harmony for the body, mind, and soul.It has shown to decrease anxiety, and improve relaxation and immunological functioning, such as increasing IgA levels (9) .
Psychoneuroimmunology has studied the connections between tension-related changes on immune responses, and consequently in the susceptibility to diseases and the possibility of recovering from illness.Individuals with serious psychoneuroimmunologic disorders caused by undergoing stressful situations demonstrate that the immune and nervous systems are both involved in the physical and psychic processes of adaptation to the day-to-day stress (10) .
Taking into consideration the evidence that the puerperal period may cause anxiety, studies in

METHODOLOGY
This is an experimental study, performed in a maternity hospital in the municipality of Serra, state of Espírito Santo, Brazil.Sixty puerperae, hospitalized in non-private rooms in the maternity, were selected for the study.Thirty were assigned to the control group and 30 to the experimental group.The size of the sample was calculated for both groups considering a 5% level of significance, testing power of 80%, minimum difference to be detected of 4mg/dl, and standard deviation of 5.5.
Therefore, the resulting sample size was 30 individuals for each group.The sample was comprised of puerperae who had given birth in this institution.In addition, the women's pregnancy lasted at least 37 weeks, they were hospitalized in non-private rooms with their newborn child, and had not had any infectious problems during pregnancy or during the period of study.Moreover, they should not have a personal or family history of psychiatric disease or use any illicit drug.All of the puerperae received information about the study, and signed a consent form agreeing to participate.
The following variables were used: age, level of education, marital status, type of childbirth, parity, trait and state of anxiety, and salivary IgA level.
After several anxiety scales had been analyzed, we chose to use the STAI instrument -State Trait Anxiety Inventory.This inventory is named IDATE in Brazil, and has proven be very useful and precise for the identification of anxiety in the puerperal period, despite it not being specific for this moment (11) .STAI is comprised of two parts, with 20 statements each.The anxiety trait evaluates how the woman normally feels in her life, or, in the present case, how she felt before childbirth, using the scale: almost all the time = 4, frequently = 3, sometimes = 2, almost never = 1.The anxiety state evaluates the woman's state of anxiety at the moment of the postpartum interview, measured in the scale: no = 1, a little = 2, a lot = 3, totally = 4. Scoring for each instrument varies from 20 to 80, and the result is classified according to the score (10) .
The anxiety trait was evaluated in both control and experimental groups, in the first 24 hours after childbirth.The anxiety state was evaluated in the first 24 hours after childbirth and one week after.
The puerperae from the experimental and control group had their salivary IgA concentration measured.Two samples were collected from each mother by the researcher, one up to 24 hours after childbirth and another seven days after, in both groups.
The samples of saliva were collected between 3 and 5 PM, always before dinnertime, and before performing the relaxation techniques with the experimental group.The total IgA concentration was determined by immunoturbidimetry.

The experimental group received instructions according to the relaxation technique proposed by
Benson (8) , which uses four essential elements: a quiet environment, a mental device, a passive attitude and a comfortable position.The relaxation technique was individually explained to each puerpera during the period they were in the hospital (two days), so that they could learn and perform them twice a day; once after waking up and another before sleeping.
According to the Ministry of Health, puerperae who are clinically well may be released from care after 48 hours of normal childbirth and 72 hours after cesarean childbirth (12)   .Therefore, we chose to instruct patients for two consecutive days, because of their short stay in the maternity and difficulty to return to the institution during the puerperal period, due to the need to protect the newborn and the patient's need

RESULTS
No significant differences were found between the control and the experimental groups regarding the variables age, level of education, marital status, type of childbirth, and parity.
In both control and experimental groups, the prevalent age range was from 19 to 25 years (60% and 56.7%, respectively).As for the level of education, 63.3% of the experimental group and 36.6% of the control group had not concluded elementary education; 30% of the women had either a complete elementary education level or an incomplete high school level.Such predominance of women with elementary education levels may occur because the maternity hospital is a public institution, catering mainly to a low-income and low-education clientele.Regarding marital status, most women in both groups live with their partner in a stable relationship (73.3% in the control group and 66.7% in the experimental group).There was a higher incidence of normal childbirth among the puerperae, with over 90% in both groups, maybe because the hospital maternity attends low-risk cases.As for parity, there was a prevalence of multiparity women, with two or more children (66.7% in the control group and 70% in the experimental group).
A study describing the epidemiological profile of 1,335 puerperae cared for in this maternity hospital from January to December/2002 found similar results for the variables age, marital status, level of education, and type of delivery (13)   .
The anxiety evaluated in this study refers to "natural anxiety" as an everyday phenomenon, with a motivating function that mobilizes resources for the adaptation of the individual to new situations.When anxiety cases are simpler, superposition of symptoms is higher, as well as the lack of specificity in the clinical condition.In this sense, anxiety and depression may be part of the general "stress process" (1) .
According to Figure 1, puerperae in both groups showed an average anxiety trait; Thus, there was no significant difference between the groups (p = 0.137).The same anxiety trait behavior was observed in other studies (5,11) .
puerperae showed higher anxiety state values than the women in the experimental group one week after childbirth.However, no significant statistical difference was found between both groups (p = 0.236).
Another study performed with 120 women who had a normal or cesarean delivery in hospitals in the region of Vitória in Espírito Santo, using the STAI instrument, also found a medium-intensity level of postpartum anxiety (11) .
A study with women in England found that 13% showed anxiety in the third trimester of gestation, while only 8.1% reported anxiety after 8 weeks of childbirth.Of the women who showed high levels of anxiety after childbirth, 64% have also reported the presence of anxiety during pregnancy, concluding that most cases of postpartum anxiety were preceded by a history of anxiety in the antenatal period (3) .
Another study, performed in Sweden with 1,465 women, found that only 5.9% showed some anxiety disorder during gestation (4) .A study analyzing the anxiety of 634 French pregnant women through SAIT has found an average state of anxiety during the 20 th and 28 th week of gestation (5) .Figure 3 shows that, when the average anxiety level within each group is evaluated separately, one week after childbirth, the control group maintained a state of average anxiety, while the experimental group showed a decrease in their scores.Thus, when the anxiety states of the control group in the first and second moments are compared, no significant differences were observed (p = 0.465).However, in the experimental group, a considerable difference was verified (p < 0.01), showing that there was a noteworthy decrease in the anxiety state levels in the puerperae submitted to relaxation.

Control
our socio-cultural context should be implemented.Such studies should aim to understand the factors affecting this phenomenon, so that nurses and other health professionals involved in puerperal care may intervene.This study aims to contribute to improve the quality of nursing health care to puerperae, and become a reference for anxiety assessment in the puerperal period.The objectives are to evaluate the effect of relaxation techniques on anxiety levels, and to examine the relation between anxiety and salivary IgA in the puerperae.
to recover.Collection of information, registry of instruments, and the performance of the IgA tests were started after the approval of the Research Ethics Committee of the Biomedical Center of the Federal University of Espírito Santo, starting in April/2004 and ending in March/2005.The analysis of the data was performed with the Social Package for Statistical Science (SPSS) 11 (2002), and the level of significance was fixed at 5%, corresponding to á = 0.05 (level of reliability of 95%).The Mann-Whitney test was used to compare the levels of anxiety between the control and the experimental groups.The Wilcoxon test was applied to verify the level of anxiety in each group at each moment.Pearson's correlation was used to evaluate the correlation between the anxiety trait and anxiety state variables.