Lifestyle Mod
Lifestyle Mod
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What is This?
Authors’ Note: Author Hulya Cakir introduced the lifestyle modification education to the par-
ticipants in the intervention group, performed the statistical analysis, and interpreted the results.
Author Rukiye Pinar designed the investigation, supervised all educational sessions, and assisted
in the statistical analysis, interpretation of results, and preparation of the manuscript. Both
authors read and approved the final manuscript.
190
                         Lifestyle Modification in
                          Hypertensive Patients
    Lifestyle modification, previously termed nonpharmacologic therapy,
has an important role to play in the lives of hypertensive and nonhypertensive
individuals. In hypertensive individuals, it can serve as initial treatment be-
fore the start of drug therapy and as an adjunct to medication in persons
already on drug therapy (Appel, 2003; JNC-VII, 2003; Svetkey et al., 2005;
Vestfold Heartcare Study Group, 2003). Major lifestyle modifications seen
to lower BP include weight reduction in those individuals who are over-
weight or obese, adoption of the eating plan known as Dietary Approaches to
Stop Hypertension (DASH), dietary sodium reduction, physical activity, and
moderation of alcohol consumption (Bacon et al., 2004; JNC-VII, 2003;
Svetkey et al., 2005; P. K. Whelton, He, et al., 2002).
    Many studies have demonstrated that each of these lifestyle modifica-
tions will decrease BP levels (Appel et al., 1997; Bacon et al., 2004;
Blumental et al., 2000; Bray et al., 2004; Cutler, Follmann, & Allender,
1997; Grimm et al., 1997; Miller et al., 2002; Sacks et al., 2001; Svetkey
et al., 2004, 2005; Writing Group of the PREMIER Collaborative Research
Group, 2003). Even an apparently small reduction in BP can have enormous
benefits on cardiovascular events. A 3 mmHg reduction in systolic BP
(SBP), for instance, might lead to an 8% reduction in stroke mortality and a
5% reduction in mortality from coronary heart disease (Stamler et al., 1989).
In contrast to most drug therapies, lifestyle modifications that reduce BP can
also prevent or control other chronic conditions (Knowler et al., 2002;
Stamler et al., 1989).
Purpose
Design
Sample
Method
Education on Comprehensive
Lifestyle Modification
    The main components of the comprehensive lifestyle modification were
to reduce weight, to reduce sodium intake, to reduce alcohol consumption, to
increase physical exercise to a moderate degree, to give up cigarette smok-
ing, and to learn stress management. Shortly after randomization, a class was
held for all participants in the intervention group. This class consisted of a
30-minute lecture by a nurse on how to control hypertension to prevent heart
                                 Table 1
                  Baseline Characteristics of Participants
                                                                             a                            a
                                                      Intervention Group n               Control Group n
Sex
  Female                                                        19                                18
  Male                                                          11                                12
Age
  M                                                             52.2                              55.6
  SD                                                             8.6                               8.0
Education
  Primary school education                                      13                                19
  Secondary school and/or more education                        17                                11
Marital status
  Married                                                       26                                23
  Unmarried                                                      4                                 7
Antihypertensive medication
  Regular                                                       22                                23
  Irregular                                                      8                                 7
Using salt-lowered dietb
  Yes                                                           17                                17
  No                                                            13                                13
Using fat-lowered dietb
  Yes                                                            6                                 5
  No                                                            24                                25
Smoker                                                          10                                 6
Nonsmoker                                                       20                                24
Alcohol consuming (≥30 ml ethanol/day)
  Yes                                                            5                                 6
  No                                                            25                                24
M SD M SD
(continued)
                                     Table 1 (continued)
                                                                                   a                    a
                                                            Intervention Group              Control Group
                                                              M              SD             M         SD
a. n = 30.
b. Some participants used salt-lowered and fat-lowered diets together.
c. t = 2.69, p < .05.
diseases and stroke and included core knowledge and information on the
behavioral skills necessary to manage hypertension. In the first month, two
60-minute classes were also held for groups of 6 to 8 participants. In these
classes, participants were provided with information and detailed guidelines,
especially on the daily number of servings from each of the six food groups
(meats and protein, grains, vegetables, fruits, dairy, and fats and oils) and the
requisite amount of fat intake, sodium intake, alcohol consumption, and
physical activity.
   The diet recommendations were mainly based on the DASH diet,
which emphasizes fruits, vegetables, and low-fat dairy foods; includes whole
grains, poultry, fish, and nuts; and recommends smaller amounts of red meat,
sweets, and sugar-containing beverages. Compared to the typical diet, the
DASH diet contains smaller amounts of total and saturated fats and choles-
terol and larger amounts of potassium, calcium, magnesium, dietary fiber,
and protein (JNC-VII, 2003; P. K. Whelton, He, et al., 2002). Individual
counseling was conducted at the end of each class.
   The expected goal was that participants would have a weight loss of 0.5 kg
per week achieved gradually by decreasing energy and fat intake and increas-
ing physical activity through lifestyle changes during the first 12 weeks of
intervention. To attain this goal, participants were recommended a diet with a
calorie level that was 500 kcal per day less than projected isocaloric needs.
This level of calorie reduction was expected to result in an average weight
loss of 0.4 kg (1 pound) per week if exercise patterns were unchanged. We
estimated that the increased energy expenditure from increased activity
would lead to an additional weight loss of at least 0.1 kg (0.25 pounds) per
Control Group
   Participants in the control group were provided with routine outpatient
services and were asked to maintain their usual lifestyles, including dietary
and exercise habits, for 6 months until they were reexamined.
calculated as weight (kg) divided by the square of the height (m2). A BMI of
≥ 25.5 kg/m2 for men and ≥ 26.6 kg/m2 for women was regarded as over-
weight. Waist circumference was measured on the metric scale (National
Institute of Health, 1998).
   Health Promoting Lifestyle Profile (HPLP; Walker, Sechrist, & Pender,
1987) evaluated behavioral changes on lifestyle modification. The HPLP is a
48-item tool that assesses the frequency with which individuals report
engaging in activities aimed at increasing their level of health and well-
being. Responses are scaled from 1 (never) to 4 (routinely), with higher
scores indicating more frequent practice of health behavior measures. This
instrument is composed of 6 subscales: self-realization, health responsibility,
exercise, nutrition, interpersonal support, and stress management. There are
different scores for every subscale in the HPLP, as shown in parentheses:
self-realization (13-52), health responsibility (10-40), exercise (5-20), nutri-
tion (6-24), interpersonal support (7-28), and stress management (7-28). The
subscales in HPLP can be evaluated independently or as a total of all sub-
scales. The total score of HPLP ranges from 48 to 192 (lowest and highest
score). In the present study Cronbach’s alpha ranged between .72 to .89 for
the subscales and was .94 for the total scale. Incidence of alcohol consump-
tion and smoking was obtained from a questionnaire and self-reported
patient diaries. All data were gathered at baseline and at the end of 6 months,
except for data on sociodemographics.
Analysis of Data
Findings
level. The average distribution of the BP values, lipid values (except for
triglyceride level), obesity parameters, and HPLP total and subscales scores
in the two groups were also similar. The triglyceride level was slightly higher
in the control group than in the intervention group (p < .05; see Table 1).
Effects of Comprehensive
Lifestyle Modification
   Differences in BP, fasting lipids, obesity parameters, and HPLP among
the participants in the intervention group were achieved. Table 2 displays the
effects of comprehensive lifestyle modification on outcomes and shows the
mean value of the differences reached by participants in the intervention
group in comparison with the control group.
BP
   Both SBP and DBP decreased in the intervention group but not in the con-
trol group. From baseline to 6 months, the mean reductions in SBP and DBP
were 8.8 (SD = 5.2) and 6.9 (SD = 5.3) mmHg, respectively. In the control
group, both SBP and DBP increased over time. These increases were 1.2
(SD = 5.3) mmHg for SBP and 1.6 (SD = 4.6) mmHg for DBP (see Table 2).
Fasting Lipids
   Participants in the intervention group had significantly lower levels of TC,
LDL-C, and triglicerides at 6 months from the baseline. The mean decrease
in the TC, LDL-C, and triglicerides was significant. HDL-C slightly in-
creased after comprehensive lifestyle modification, but this increase was not
effective in making a meaningful statistical difference (see Table 2).
Obesity Parameters
    There were significant differences in weight loss, BMI, and waist circum-
ference between the two groups at the end of 6 months. Participants in the
intervention group displayed an average weight loss of 3.8 (SD = 2.3) kg,
compared with a mean gain of 0.4 (SD = 2.4) kg for those in the control
group. A similar pattern emerged for BMI and waist circumference, with the
participants in the intervention group showing significant changes compared
to those in the control group, who showed no change on those variables (see
Table 2).
                                                                        200
                                                                                                   Differences in Blood Pressure (BP), Fasting Lipids, Obesity Parameters, and
                                                                                          Health Promotion Lifestyle Profile (HPLP) Scores From Baseline to 6 Months in the Two Groups
                                                                                                                                                 a                                                  a
                                                                                                                             Intervention Group                                         Control Group
                                                                                                                                                                                                                             Between
                                                                                                                                                                                                            b
                                                                                                              Baseline      6 Months         Changeb                    Baseline    6 Months        Change                    Group
                                                                                                              M      SD     M       SD       M        SD    p Value   M       SD    M        SD     M       SD    p Value p Value
                                                                              BP
                                                                              Systolic BP                   144.2   11.8   135.3     9.9    –8.8     –5.2   p < .001 141.5    9.7 142.6      8.6    1.2     5.3   p > .05     p < .001
                                                                              Diastolic BP                   91.0    8.9    84.0     6.9    –6.9     –5.3   p < .001 86.9     6.9 88.5       6.3    1.6     4.6   p > .05     p < .001
                                                                              Lipid values (mg/dl)
                                                                              Total cholesterol             212.3   31.8   184.6    19.6   –27.7 –35.3      p < .001 220.7   40.2 222.5     29.0   1.8 19.3       p > .05     p < .001
                                                                              HDL cholesterol                42.8    9.6    44.2    10.4     1.5   5.2      p > .05   41.7   10.6 41.5       8.7 –0.2 –3.9        p > .05     p > .05
                                                                              LDL cholesterol               138.3   34.3   109.4    16.9   –28.9 –38.2      p < .001 141.8   26.9 136.6     18.4 –5.1 –15.6       p > .05     p < .01
                                                                              Trygliceride                  145.8   46.7   131.8    38.6   –14.0 –25.9      p < .01 199.9    99.9 188.7     76.5 –11.2 –35.0      p > .05     p > .05
                                                                              Obesity parameters
                                                                              Weight (kg)                    77.6   12.0    73.8    10.8    –3.80 –2.31 p < .001 78.5        15.3 78.9      14.4    0.46    2.43 p > .05      p < .001
                                                                              Body mass index (kg/m2)        29.3    4.9    27.7     4.3    –1.50 –0.84 p < .001 30.2         6.1 30.3       5.9    0.13    0.89 p > .05      p < .001
                                                                              Waist circumference (cm)       99.1    9.7    95.3     8.9    –3.83 –2.32 p < .001 100.4       12.3 100.9     12.0    0.53    0.43 p > .05      p < .001
                                                                              HPLP
                                                                              HPLP total                    123.9   19.6   141.9    14.8    18.0      1.0   p < .001 117.6   23.2 113.3     20.5   –4.4    –4.4   p < .001    p < .001
                                                                              Self-realization               38.8    6.4    41.5     4.9     2.6      2.9   p < .001 36.2     7.9 36.4       7.1    0.2     1.7   p > .05     p < .001
                                                                              Health responsibility          23.4    6.2    27.4     5.0     4.3      3.1   p < .001 22.3     6.4 20.9       5.4   –1.5    –1.8   p < .001    p < .001
                                                                              Exercise                        7.5    2.5    10.4     2.0     2.8      1.5   p < .001   7.1    2.4   6.7      1.9   –0.4    –0.7   p < .05     p < .001
                                                                              a. n = 30.
                                                                              b. Change is calculated as 6 months minus baseline.
                      Cakir, Pinar / Lifestyle Modification in Hypertensive Patients 201
Discussion
                                                                                                                                            Table 3
                                                                                                                   Differences Between Baseline and Last Appointments of
                                                                                                                Drug Therapy, Diet, Cigarette Smoking, and Alcohol Consuming
Downloaded from wjn.sagepub.com at UNIV OF PITTSBURGH on May 26, 2014
                                                                              Antihypertensive medication
                                                                                Regular                                                    22                30              p < .01          23            23            p > .05
                                                                                Irregular                                                   8                 0                                7             7
                                                                              Using salt-lowered dietc
                                                                                Yes                                                        17                30              p < .001         17            18            p > .05
                                                                                No                                                         13                 0                               13            12
                                                                              Using fat-lowered dietc
                                                                                Yes                                                         6                22              p < .001          5             7            p > .05
                                                                                No                                                         24                 8                               25            23
                                                                              Cigarette smoking
                                                                                Smoker                                                     10                 8              p > .05           6             6            p > .05
                                                                                Nonsmoker                                                  20                22                               24            24
                                                                              Alcohol consuming (≥30 ml ethanol/day)
                                                                                Yes                                                         5                 4              p > .05           6             5            p > .05
                                                                                No                                                         25                26                               24            25
                                                                              a. n = 30.
                                                                              b. McNemar test was used.
                                                                              c. Some participants used salt-lowered and fat-lowered diet together.
                       Cakir, Pinar / Lifestyle Modification in Hypertensive Patients 203
1990; Urata et al., 1987), or of two factors, typically sodium reduction and
weight loss (P. K. Whelton et al., 1998), exercise and weight loss (Blumental
et al., 2000), or sodium reduction and DASH diet (Bray et al., 2004; Svetkey
et al., 2004). The present randomized controlled trial done by nurses demon-
strated the feasibility of a simultaneous comprehensive lifestyle modifi-
cation and its beneficial effects.
Conclusion
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Huyla Cakir graduated from the college of nursing in 1994 and acquired her master’s degree in
2003. She has worked with the Cardiology Institute for 7 years in Istanbul. At the end of 2003, she
was appointed as director nurse at a hospital in Eskisehir, Turkey.
Rukiye Pinar is a chairperson of the Department of Medical Nursing at the Marmara University,
College of Nursing in Istanbul, Turkey. She graduated from the college of nursing in 1988,
acquired her master’s degree in 1991, doctorate degree in 1995, associate’s degree in 1998, and
professor degree in 2005. After receiving her doctorate degree she completed an advanced
diploma program on diabetes at Surrey University, London, United Kingdom, for 1 year. She has
also been in Toronto, Canada, for 3 months as an observer on adult education. Her main study
topics are quality of life, health promotion, and adult patient education. She has worked as an
executive committee member and/or active member for many international organizations on
diabetes education (European Diabetes Nurse Working Group, Federation of European Nurses
on Diabetes [FEND], Diabetes Education Consultative Section of International Diabetes Feder-
ation). She currently works as thesis director for students who are in master’s or doctorate degree
programs besides nursing education.