Journal List > Korean J Urol > v.49(7) > 1005148

Ko, Jeong, Jang, Choi, Kim, Kim, Lee, and Lee: Association between Lower Urinary Tract Symptoms and Erectile Dysfunction in Aging Men: Hallym Aging Study

Abstract

Purpose

The aim of this study was to investigate the relationship between lower urinary tract symptoms (LUTS) and erectile dysfunction (ED) in a population-based cohort study, Hallym Aging Study (HAS).

Materials and Methods

Among the 1,520 participants in HAS, 300 men aged ≥50 years, who underwent detailed health evaluations, includeing health-related questionnaires, evaluation of the medical history and various life style factors as well as clinical measurements, were included in the study. LUTS and ED were assessed by validated questionnaires, the International Prostate Symptom Score (IPSS) and a 5-item version of the International Index of Erectile Function (IIEF-5).

Results

The prevalence and severity of LUTS and ED increased and significantly with age (p<0.001). The IIEF-5 score declined as the severity of LUTS increased in each age group. There was a significant negative correlation between the IPSS score and the IIEF-5 score (age adjusted r= −0.275, p<0.001). The multivariate logistic regression analysis, controlling for age and comorbidities, showed that men with moderate/ severe LUTS were 4-9 times more likely to have ED than men with no/mild LUTS; in addition, men with ED were 5 times more likely have moderate/severe LUTS than men without ED.

Conclusions

The presence and severity of LUTS were independent risk factors for ED and vice versa. These results highlight the clinical importance of evaluating LUTS in patients with ED, and the need to consider the presence of ED in the management of patients with LUTS.

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Fig. 1.
Prevalence and severity of lower urinary tract symptoms (LUTS) (A) and erectile dysfunction (ED) (B) in different age groups of the study population.
kju-49-633f1.tif
Fig. 2.
The International Index of Erectile Function (IIEF-5) score by severity of lower urinary tract symptoms (LUTS) in each age group.
kju-49-633f2.tif
Fig. 3.
Correlation of the International Prostate Symptom Score (IPSS) and International Index of Erectile Function (IIEF-5). Age adjusted partial Pearson’s correlation coefficient: r=−0.275 (p< 0.001).
kju-49-633f3.tif
Table 1.
The demographic characteristics of respondents
Age group, n (%) Total
50-59 60-69 70-79 80-89
Respondents 33 (11.0) 60 (20.0) 174 (58.0) 33 (11.0) 300 (100)
DM 1 (3.0) 6 (10.0) 27 (15.5) 5 (15.2) 39 (13.0)
Hypertension 7 (21.2) 19 (31.7) 74 (42.5) 16 (48.5) 116 (38.7)
Medical
Hyperlipidemia 2 (6.1) 3 (5.0) 6 (3.4) 0 (0.0) 11 (3.7)
History
CVA 1 (3.0) 4 (6.7) 20 (11.5) 3 (9.1) 28 (9.3)
Smoking 18 (54.5) 18 (30.0) 40 (23.0) 7 (21.2) 83 (27.7)
Alcohol 23 (69.7) 28 (46.7) 84 (48.3) 16 (48.5) 151 (50.3)
BMI (kg/m2), mean±SD 29.5±18.3 28.3±16.8 28.9±18.7 27.3±18.9 28.6±18.3

DM: diabetes mellitus, CVA: cerebral vascular accident, BMI: body mass index

Table 2.
IPSS and IIEF-5 scores by age group
Age group, mean±SD Total p-value*
50-59 60-69 70-79 80-89
IPSS 7.7±5.7 9.6±6.4 13.5±9.5 16.6±10.3 12.4±9.1 <0.05
IPSS-storage 3.1±2.4 4.1±3.1 5.5±4.1 7.4±4.3 5.2±3.9 <0.05
IPSS-voiding 4.6±3.7 5.5±4.3 8.0±5.9 9.5±6.7 7.3±5.7 <0.05
IIEF-5 16.5±5.3 11.0±6.4 7.9±6.9 3.8±6.0 9.0±7.3 <0.05

IPSS: International Prostate Symptom Score, IIEF-5: 5-item version of the International Index of Erectile Function

* : ANOVA test

Table 3.
Multivariate logistic regression results for the relative risk of ED by LUTS severity and comorbidity
ED Odds ratio* (95% confidence interval)
LUTS severity
No LUTS 1 1
Mild 1.63 (0.32-8.35)
Moderate 6.95 (1.26-38.36) 4.41 (2.02-9.64)
Severe 14.88 (1.75-126.36) 9.48 (2.06-43.58)
Age 1.09 (1.04-1.14)
Body mass index (≥25kg/m2) 1.77 (0.84-3.75)
Diabetes mellitus 2.54 (0.54-11.90)
Hypertension 2.08 (0.88-4.91)
Hyperlipidemia 1.26 (0.22-7.15)
Cerebral vascular accident 2.58 (0.31-21.42)
Smoking 1.14 (0.52-2.51)
Alcohol 1.17 (0.56-2.41)

ED: erectile dysfunction, LUTS: lower urinary tract symptoms.

* : age, body mass index, comorbidities and life style factors adjusted

: odds ratio for no/mild LUTS vs

: p<0.05, odds ratio, moderate and severe LUTS

Table 4.
Relative risk of ED by individual items on the IPSS
Odds ratio 95% confidence interval
Incomplete emptying 1.32* 1.03-1.68
Frequency 1.47* 1.12-1.92
Intermittency 1.40* 1.09-1.80
Urgency 1.60* 1.17-2.19
Weak stream 1.49* 1.20-1.85
Hesitancy 1.48* 1.11-1.98
Nocturia 1.67* 1.20-2.32

ED: erectile dysfunction, IPSS: International Prostate Symptom Score.

* : p<0.05

Table 5.
Multivariate logistic regression results for the relative risk of moderate/severe LUTS by ED severity and comorbidity
Moderate/severe LUTS Odds ratio* (95% confidence interval)
ED severity
No ED 1 1
Mild 2.17 (0.89-5.29)
Moderate 6.98 (2.93-16.64) 4.89 (2.38-10.02)
Severe 6.04 (2.70-13.53)
Age 1.02 (0.99-1.06)
Body mass index (≥25kg/m2) 0.82 (0.49-1.40)
Diabetes mellitus 0.75 (0.35-1.60)
Hypertension 0.89 (0.51-1.55)
Hyperlipidemia 0.56 (0.15-2.05)
Cerebral vascular accident 0.99 (0.40-2.42)
Smoking 1.05 (0.58-1.90)
Alcohol 0.86 (0.52-1.45)

LUTS: lower urinary tract symptoms, ED: erectile dysfunction.

* : age, body mass index, comorbidities and life style factors adjusted odds ratio

: p<0.05,

: odds ratio for no ED vs ED

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