Only 23% of physicians reported that they initiate
antihypertensive treatment among older patients (≥65
years) with an SBP of 140 mm Hg (Figure 4). Twen-
ty-three percent indicated that they initiate treatment
at an SBP between 141 and 150 mm Hg. Forty-one
percent reported that they initiate treatment for an
SBP 151–160 mm Hg and 13% said that they initiate
treatment only for an SBP >160 mm Hg. Further-
more, only 13% of physicians reported prescribing
pharmacologic treatment for older patients with a
sustained SBP of 140 mm Hg. A majority (65%) of
physicians reported that they would aim to treat ISH
to an SBP goal of 140 mm Hg or below in older pa-
tients (≥65 years). This 65% is significantly more than
the 23% who said they would initiate treatment at an
SBP of 140 mm Hg (p<0.05).
100
90
80
70
60
50
40
30
20
10
0
50-64 years
>65 years
*
76
44
38
*
29
27
12
Uncontrolled
hypertension in
population
Uncontrolled ISH in
population
Proportion of
uncontrolled
hypertensive patients
with ISH
Figure 3. Diagnosis and treatment patterns of patients
with isolated systolic hypertension (ISH)
*p<0.005 for elderly vs. middle-aged patients
More physicians indicated that they would initiate
treatment for a sustained SBP of 140 mm Hg in mid-
dle-aged than in elderly patients (52% and 23%
respectively; p<0.005), and more would treat middle-
aged patients to the goal SBP of 140 mm Hg than
they would the elderly (90% and 65%; p=0.04).
From the remaining survey questions, no physician
offered reasons for not treating ISH (all acknowl-
edged treating it). The majority of physicians used the
fifth Korotkoff sound for measuring BP, and the
lifestyle recommendations for lowering BP were even-
ly balanced between exercise, weight loss, stress re-
duction, limiting alcohol intake, and reducing salt
(data not shown). Most physicians (55%) listed di-
uretics as their preferred choice for treating ISH.
Physician Survey
Questionnaires were sent to all 35 physicians in the
multispecialty provider group of these patients.
Thirty-one questionnaires (89%) were returned and
included in the analysis. Half of the physicians were
general practitioners (GPs) and half were general in-
ternists (GIs). The median length of time in practice
for both types of physicians (GPs and GIs) was 13
years (range, 1–44 years). Ninety-three percent of
the GPs and 75% of the GIs had been in practice for
more than 5 years. Although physician-patient data
were not explicitly linked, the 646 patients in the
chart review were all part of the practices of these
35 physicians.
Physicians were asked to rate the influence of clini-
cal experience, consensus guidelines, and other factors
on their treatment decision-making. Items were rated
on a scale of 1 to 5, with 1 indicating no influence at
all and 5 indicating a great influence. The mean rat-
ings were 4.4 0.6 for clinical experience and 4.0 0.7
for consensus guidelines. In decreasing order of im-
portance, other factors influencing physician decision-
making were continuing medical education, medical
journals, expert opinions, textbooks, and pharmaceu-
tical representatives.
Only 52% of physicians reported that they initiate
some form of antihypertensive treatment at an SBP of
140 mm Hg in their middle-aged patients (Figure 4).
Thirty-two percent reported that they initiate treat-
ment at an SBP between 141 and 150 mm Hg. Six-
teen percent reported that they initiate treatment for
an SBP >150 mm Hg. Only 35% of physicians re-
ported that they would initiate pharmacologic treat-
ment in middle-aged patients with ISH at a sustained
SBP of 140 mm Hg. In contrast, most physicians
(90%) reported that they would aim to treat middle-
aged patients with ISH to a goal of SBP 140 mm Hg
or below, once therapy was initiated.
DISCUSSION
ISH represented 76% and 45% of uncontrolled BP in
the older and middle-aged samples in this study. Al-
though the sample was relatively small, these propor-
tions are consistent with data collected from NHANES
III several years ago. In NHANES III, ISH represented
over 80% of uncontrolled hypertension in individuals
greater than 60 years of age and approximately 50%
of uncontrolled hypertension in those 50–59.
Mean BP values were somewhat lower in our
study than in NHANES III. Our older sample with
ISH had a mean SBP of 148.1 9.2 (SD) mm Hg,
whereas in NHANES III, individuals with ISH over
50 years of age had mean SBPs of 152.3 mm Hg (un-
treated) and 155.5 mm Hg (treated). Our sample size
was small, so the difference could have been due to
chance alone. Alternatively, it could reflect some
progress in treating ISH over the past decade, or it
may reflect characteristics of the site we surveyed.
Data from a 10.6-year follow-up private practice ex-
perience indicate that a higher control rate was ob-
served in patients with diastolic/systolic hypertension
than in patients with ISH; only 39% of these patients
96
THE JOURNAL OF CLINICAL HYPERTENSION
VOL. IV NO. II MARCH/APRIL 2002