Int J Med Sci 2022; 19(7):1103-1109. doi:10.7150/ijms.73417 This issue Cite

Research Paper

The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study

Hsiang-Wen Chien1,2,3,4, Chiao-Wen Lin5,6, Chia-Yi Lee7, Jing-Yang Huang8,9, Shun-Fa Yang8,9 Corresponding address, Kai Wang1,2,3 Corresponding address

1. Department of Ophthalmology, Cathay General Hospital, Taipei, Taiwan.
2. Departments of Ophthalmology, Sijhih Cathay General Hospital, New Taipei City, Taiwan.
3. School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei, Taiwan.
4. School of Medicine, National Tsing Hua University, Hsinchu, Taiwan, Taiwan.
5. Institute of Oral Sciences, Chung Shan Medical University, Taichung, Taiwan.
6. Department of Dentistry, Chung Shan Medical University Hospital, Taichung, Taiwan.
7. Department of Ophthalmology, Nobel Eye Institute, Taipei, Taiwan.
8. Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.
9. Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan.

Chien HW, Lin CW, Lee CY, Huang JY, Yang SF, Wang K. The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study. Int J Med Sci 2022; 19(7):1103-1109. doi:10.7150/ijms.73417.
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Graphic abstract

This study aimed to investigate the influence of androgen deprivation therapy (ADT) for the development of dry eye disease (DED) in subjects with prostate cancer via the use of national health insurance research database (NHIRD) of Taiwan. A retrospective cohort study was conducted and patients were selected as prostate cancer with ADT according to diagnostic and procedure codes. Each participant in that group was then matched to one patient with prostate cancer but without ADT and two subject s without prostate cancer and ADT. And a total of 1791, 1791 and 3582 participants were enrolled in each group. The primary outcome was set as the DED development according to the diagnostic codes. Cox proportional hazard regression was applied to calculate the adjusted hazard ratio (aHR) and 95% confidence interval (CI) of ADT and other parameters for DED development. There were 228, 126 and 95 new events of DED developed in the control group, the prostate cancer without ADT group and the prostate cancer with ADT group. The rate of DED in the prostate cancer with ADT group (aHR: 0.980, 95% CI: 0.771-1.246, P= 0.8696) and Prostate cancer without ADT group (aHR: 1.064, 95% CI: 0.855-1.325, P= 0.5766) were not significantly different compared to the control group. In addition, the patients aged 70-79 years old demonstrated a significantly higher incidence of developing DED compared to those aged 50-59 years old (aHR: 1.885, 95% CI: 1.188-2.989, P= 0.0071). In conclusion, the use of ADT did not alter the incidence of subsequent DED.

Keywords: androgen deprivation therapy, dry eye disease, age, database, epidemiology


The prostate cancer is a prevalent cancer in male population [1], with more than 1,400,000 new cases of prostate cancer and 370,000 related deaths were reported in 2020 globally [2]. About the treatment of ADT, the androgen deprivation therapy (ADT) has been used as a common therapy that can reduce the prostate function and suppress the progression of prostate cancer [1, 3, 4]. The treatment options of ADT in prostate cancer include the LHRH agonists, estrogens, antiandrogens, and orchiectomy [5]. The median survival duration for prostate cancer was about 14 years under the ADT management [6], and the early use of ADT showed certain benefits for patients with prostate cancer and nodal metastases [7].

Several complications had been reported after the ADT management [8]. The cardiovascular disorders are common complications after the ADT arrangement [8, 9]. According to one research, the subjects received ADT were correlated to higher incidence of ischemic stroke and coronary arterial diseases [8]. Besides, the rate of sudden cardiac death was significantly higher in patients received the ADT [10]. In addition to the above disorders, the ADT is associated with the development of deep vein thrombosis [11]. There were some other complications after ADT which include the cognitive decline, anemia, osteoporosis, depression and diabetes mellitus (DM) [12-14].

The hormone status, like the level of growth factor and estrogen, are known to influence the ocular condition [15, 16]. The dry eye disease (DED) is a multifactorial disorder that features with tear film dysfunction and ocular surface damage [17]. According to previous experience, the aromatase inhibitor therapy would result in DED symptoms [18], and the use of 5α-Reductase inhibitor finasteride would also contribute to androgen deficiency DED [19]. About other experiences between androgen deficiency status and DED, one study demonstrated the protective effect of androgen on DED while another randomized controlled double-masked study showed insignificant correlation between the androgen level and DED development [20, 21]. Consequently, additional long-term research may be conduct to survey this issue more clearly.

The purpose of the current study is to investigate the possible relationship between the ADT and subsequent DED via the application of the national health insurance research database (NHIRD) of Taiwan. In addition to ADT, other potential risk factors for DED occurrence were also evaluated in the statistical analysis.

Materials and Methods

Data source

Our retrospective cohort study adhered to the declaration of Helsinki in 1964 and its later amendment, and the current study was approved by both the Institutional Review Board of Chung Shan Medical University (Project identification code: CS1-20108), and the National Health Insurance Administration. Moreover, the need of informed consent from subjects was waived by the two institutions. NHIRD of Taiwan contains the claimed data of health insurance service for nearly all Taiwanese that means about 23 million individuals. The interval of NHIRD ranged from January 1, 2000 till December 31, 2018, and the data available from NHIRD include the International Classification of Diseases, Ninth Revision (ICD-9) diagnostic code, International Classification of Diseases, Tenth Revision (ICD-10) diagnostic codes, demographic data, examination code, code of procedure and international ATC codes for all medications. In our study, we used the longitudinal health insurance database (LHID) 2005 version, which is one of the sub-databases from NHIRD, for all the analyses. In LHID 2005, approximately two million patients were randomly selected from the NHIRD at the year of 2005, and these individuals were followed as the same time period as in the NHIRD.

Patient Selection

Men aged from 40 to 100-year-old who received ICD-9 or ICD-10 diagnostic codes of prostate cancer and experienced aromatase inhibitors, LHRH agonists, antiandrogens, estrogens or bilateral orchiectomy (according to procedure/ATC codes) were included in the prostate cancer with ADT group. The exclusion criteria included blindness, ocular tumor, eyeball removal procedure, severe ocular trauma, DED development or death before index date, ADT prior to prostate cancer diagnosis and prostate cancer developed before 2001 (n=572). The index date was defined as six months after the starting of ADT. Then each subject with prostate cancer and ADT was matched to one prostate cancer participant without ADT and two non-prostate cancer patients. If a prostate cancer patient with ADT cannot be matched to individuals in other two populations, that person would be discarded. The match method is propensity-score matching (PSM) with age and socio-economic status, and the non-prostate cancer population constituted the control group. In our study, 1,791, 1,791 and 3,582 patients were enrolled in the prostate cancer with ADT group, prostate cancer without ADT group and the control groups.

Main Outcome Measurement

The primary outcome is the development of DED which defined as (1) the diagnosis of DED based on the corresponded ICD-9 and ICD-10 diagnostic codes, (2) the arrangement of fluorescein test or Schirmer's test before the diagnosis of DED, and (3) the DED was diagnosed by an ophthalmologist. To survey the possible correlation between the ADT and DED, only the DED developed after the index date was defined as the achievement of the primary outcome in the current study.

Demographic and Co-morbidity Variables

To let the general status of our study population more homogenous, the effects of the following parameters were included in the multivariable analysis: age, urbanization, occupation, hypertension, diabetes mellitus (DM), coronary arterial disease (CAD), acute myocardial infarction (AMI), hyperlipidemia, cerebrovascular disease and dementia. The existence of these parameters was according to related ICD-9 and ICD-10 diagnostic codes for all the diseases. Besides, the CAD referred to those with chronic ischemic heart disease according to ICD-9 and ICD-10 diagnostic codes. All participants were followed longitudinally since the index date to the date of DED diagnosis, quit from the National Health Insurance program, or the end of NHIRD interval, which also known as the 31 December, 2018.

Statistical Analysis

SAS version 9.4 (SAS Institute Inc, NC, USA) was used for all the statistical analyses. After the PSM method, we used descriptive analysis to show the baseline characters of the three groups. The Poisson regression was used for the incidence rate of DED with corresponding 95% confidence interval (CI) among the groups. Then Cox proportional hazard regression was applied to estimate the crude as well as the adjusted hazard ratio (aHR) of DED among the three groups which considered the possible effects of the demographic data and systemic diseases in our multivariable analysis. Besides, Cox proportional hazard regression was also used to evaluate the effect of each parameter on the development of DED and presented as aHR with 95% CI. In the next step, we made the Kaplan-Meier curves to illustrate the cumulative probability of DED among the prostate cancer with ADT group, prostate cancer without ADT group and the control group, then the log rank test was used to investigate whether significant difference exist among the three survival curves from different groups. The threshold of statistical significance was set at P < 0.05.


The baseline characters of the study population are shown in Table 1. The distribution of age, urbanization and occupation were similar among the three groups due to PSM process. Moreover, the rate of systemic co-morbidities were also statistical insignificant among the three groups although a numerically higher rate of systemic diseases was found in the prostate cancer with ADT group. For the type of ADT, the antiandrogens therapy was the most commonly used ADT which 67.67 percent of patients received such management, while 61.86 percent, 11.28 percent and 7.82 percent of subjects received LHRH agonists, bilateral orchiectomy and estrogen therapy, respectively (Table 1).

There were 228, 126 and 95 new cases of DED occurred in the control group, the prostate cancer without ADT group and the prostate cancer with ADT group, respectively. In the Cox regression analysis, the incidence of DED in the prostate cancer with ADT group (aHR: 0.980, 95% CI: 0.771-1.246, P= 0.8696) and Prostate cancer without ADT group (aHR: 1.064, 95% CI: 0.855-1.325, P= 0.5766) were not significantly different compared to the control group (Table 2). Besides, the cumulative probabilities of DED development were similar among the three groups at different time point (P= 0.1413) (Figure 1).

 Table 1 

Baseline characteristics among study population

CharacterControl (n= 3582)Prostate cancer without ADT (n= 1791)Prostate cancer with ADT (n= 1791)P value
Age at index0.9607
<5019 (0.53%)9 (0.50%)10 (0.56%)
50-59220 (6.14%)101 (5.64%)107 (5.97%)
60-69922 (25.74%)453 (25.29%)463 (25.85%)
70-791498 (41.82%)778 (43.44%)737 (41.15%)
≥80923 (25.77%)450 (25.13%)474 (26.47%)
Urban2017 (56.31%)995 (55.56%)982 (54.83%)
Sub-urban1160 (32.38%)580 (32.38%)596 (33.28%)
Rural405 (11.31%)216 (12.06%)213 (11.89%)
Government employees279 (7.79%)138 (7.71%)139 (7.76%)
Labor1336 (37.30%)661 (36.91%)657 (36.68%)
Farmer and Fisherman1047 (29.23%)553 (30.88%)529 (29.54%)
Low income13 (0.36%)13 (0.73%)12 (0.67%)
Unemployed855 (23.87%)401 (22.39%)428 (23.90%)
Others52 (1.45%)25 (1.40%)26 (1.45%)
Hypertension1907 (53.24%)951 (53.10%)961 (53.66%)0.9389
DM637 (17.78%)336 (18.76%)360 (20.10%)0.1182
CAD567 (15.83%)287 (16.02%)316 (17.64%)0.2185
AMI17 (0.47%)10 (0.56%)13 (0.73%)0.5072
Hyperlipidemia616 (17.20%)291 (16.25%)326 (18.20%)0.3010
Cerebrovascular disease430 (12.00%)227 (12.67%)238 (13.29%)0.3920
Dementia91 (2.54%)47 (2.62%)56 (3.13%)0.4446
ADT type
LHRH Agonists1108 (61.86%)N/A
Antiandrogens1212 (67.67%)N/A
Estrogens140 (7.82%)N/A
Bilateral orchiectomy202 (11.28%)N/A

ADT: androgen deprivation therapy, DM: diabetes mellitus, CAD: coronary arterial disease, AMI: acute myocardial infarction, N/A: not applicable.

 Table 2 

Incidence risk of study event among study groups

EventsControlProstate cancer without ADTProstate cancer with ADT
Follow up person months22347311375590335
New case22812695
Incidence rate# (95% CI)10.20 (8.96-11.62)11.08 (9.30-13.19)10.52 (8.60-12.86)
Crude Relative risk (95% CI)Reference1.084 (0.872-1.348)1.024 (0.806-1.301)
aHR (95% CI)Reference1.064 (0.855-1.325)0.980 (0.771-1.246)

# Incidence rate, per 10000 person-months.

ADT: androgen deprivation therapy, CI: confidence interval, aHR: adjusted hazard ratio.

 Figure 1 

Kaplan-Meier curves with cumulative probability of dry eye disease among the three groups. ADT: androgen deprivation therapy; DED: dry eye disease; n: number.

Int J Med Sci Image

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 Table 3 

Adjusted hazard ratio of dry eye disease from each parameter

ParameteraHR95% CIP value
Prostate cancer without ADT1.0640.855-1.3250.5766
Prostate cancer with ADT0.9800.771-1.2460.8696
Age at index
Government employees0.9250.638-1.3420.6829
Farmer and fisherman0.8470.630-1.1380.2705
Low income1.0910.259-4.5950.9058
Cerebrovascular disease0.9490.700-1.2860.7343

ADT: androgen deprivation therapy, DM: diabetes mellitus, CAD: coronary arterial disease, AMI: acute myocardial infarction, aHR: adjusted hazard ratio, CI: confidence interval.

* denotes significant correlation to dry eye disease development.

In the analysis of different parameters, the patients aged 70-79 years old showed a significantly higher risk of developing DED compared to those aged 50-59 years old (aHR: 1.885, 95% CI: 1.188-2.989, P= 0.0071). The other parameters, including the demographic data and systemic disorders, did not demonstrated significant influence on the occurrence of DED (all P> 0.05) (Table 3).


Briefly, the current study showed the insignificant effect of ADT on the development of DED in patients with prostate cancer. In addition, the cumulative probability of DED among different patient groups did not reveal significant difference with time. On the other hand, the age between 70 to 79 years old demonstrated a prominent influence on the development of DED which served as an independent risk factor.

The formation DED is thought to be multifactorial while the inflammatory reaction is the major mechanism according to the literatures conducted recently [17, 22, 23]. In the report published by the Dry Eye Workshop, the development of DED is due to the vicious cycle the damage the ocular surface [22]. As the tear film became instable, the osmorlarity of the tear film would increase which can be exaggerated by the presence of meibomian gland dysfunction [22]. Then the inflammatory cytokine like the interleukin and tumor necrosis factors were released and cause damage to the goblet cell as well as corneal epithelium, resulting in unstable tear film [22]. Consequently, the disorder that could induce inflammatory reaction owns the chance to elevate the risk of DED development [24]. Some autoimmune diseases were associated with the DED occurrence in previous studies, which included the Sjogren syndrome, rheumatoid arthritis, systemic lupus erythematous and gout arthritis [25-28]. On the other hand, the change of hormone status can also lead to the production of inflammation cytokine [29]. In previous study, the estrogen is associated with the elevation of interleukins and reactive oxygen species [30]. Besides, the relationship between androgen and the suppression of inflammatory reaction had been established [31, 32]. However, there was no strong correlation between the androgen deficiency and the autoimmune disease, which indicated that the elevation of inflammatory process is not always cause inflammation-related disease. Moreover, the androgen deficiency status did not cause lacrimal gland inflammation in experimental study [33]. Since DED is correlated to several inflammatory processes and ADT could alter the inflammation reaction [19, 24], the potential effect of ADT on DED development should be surveyed while the results of the current study demonstrated an insignificant association between the ADT and DED.

The relationship between ADT and DED has not been established firmly in previous researches [19-21, 34], while the result of the current study illustrated a minimal influence of ADT on the subsequent DED. About the two studies that showed a significant effect of ADT on DED, one was experimental studies which used DED model to survey the potential relationship between androgen deficiency and DED [19]. Another prospective study that supported the association between DED and androgen recruited only 50 participants, and they concluded that the application of androgen transdermal device can decrease the severity of DED [21]. In the current study, we enrolled approximately 7 thousands participants in the whole study population and the follow up period can up to 18 years. Furthermore, the current study enrolled multiple parameters in the analysis model to erase the effect of possible confounders thus the results may be more reliable compared to the researches that evaluate the relationship between androgen deficiency and DED but without considering the influence of other factors [19, 21]. On the other hand, the cumulative probability of DED in the prostate cancer with ADT group did not elevate throughout the study interval compared to the prostate cancer without ADT group and the control group, which may indicates the long-term application of ADT did not increase the incidence of DED compared to non-ADT user.

Concerning the other parameters that may contribute to the development of DED, the age range from 70 to 79 years old showed a significantly higher rate of DED occurrence compared to those aged 50 to 59 years old. The age is a well-established risk factor for DED development [35]. And about the parameters of DED, older age is correlated to shorter tear break-up time and ocular surface stains compared to younger individuals [36]. In the current study, the significant correlation of old age to DED development compared to the younger population was compatible to previous experience. However, the patients aged 80 years or older did not reveal significantly higher incidence of DED compared to those aged 50 to 59 years old. There are two possible explanations for the conflicting results. Firstly, the patients older than 80 years old may become more disable and thus would not visit the ophthalmic department as easy as their younger counterpart [37], thus the diagnostic rate of DED could be reduced. Another possible reason is because the visual display terminal is another prominent risk factors for DED [38], and patients aged more than 80 years old might not use these device commonly according to clinical experience. The other parameters did not show significant effect of the development of DED. Although DM was associated with impaired corneal epithelial wound healing [39], the influence of this corneal injury may not induce persistent ocular inflammation and following DED.

About the epidemiology aspect, the DED is a prevalent disease in the elderly population [35]. In an epidemiological research, the prevalence of DED was about 11.3 percent in the population older than 50 years [40]. Although the female is more vulnerable to the DED, the prevalence of DED in the male population still reached 5.65 percent in that study.[40] On the other hand, the prostate cancer is one of the most common cancers in the elderly male population [41, 42]. According to a previous research, the prevalence of prostate cancer is above 30 per 100000 male in Asian region [43]. Moreover, the ADT was applied in nearly all the prostate cancer individuals [1]. Because both DED and prostate cancer affect a majority of elderly male population and ADT is widely applied in those with prostate cancer [1, 40], the importance to investigate whether ADT is related to following DED occurrence cannot be overemphasized.

There are some limitations in the current study. First, the retrospective design of the current study and the nature of claimed-data research will diminish the homogeneity and the accuracy of the current study. Second, we can only know the patient received DED-related exams and ADT, while the severity and treatment outcome of both prostate cancer and DED cannot be obtained in the NHIRD/LHID. Besides, we did not analyze the effect of different ADT on DED separately because many participants in the current study received more than one type of ADT. Also, more than half of patients with prostate cancer and received ADT management were excluded in the matching process which may reduce the statistical power. Nevertheless, since we want to ensure the homogeneity among different groups and the case numbers in the current study is not inferior to previous studies that survey the ADT [14, 44], the influence of this limitation may not be prominent.

In conclusion, the application of ADT did not cause higher incidence of subsequent DED either in short-term or long-term utilization. Furthermore, old age is still a risk factor for DED development especially in those aged 70-79 years old. Consequently, the use of ADT may be safe even in those with predisposing factors for DED. Further large-scale prospective study that evaluates whether the use of ADT will affect the therapeutic outcome of DED is mandatory.

Competing Interests

The authors have declared that no competing interest exists.


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Author contact

Corresponding address Corresponding authors: Shun-Fa Yang, PhD, or Kai Wang, MD., PhD. Institute of Medicine, Chung Shan Medical University, 110 Chien-Kuo N. Road, Section 1, Taichung, Taiwan. Tel.: 886-4-24739595-34253; Fax: 886-4-24723229; E-mail: (Shun-Fa Yang); (Kai Wang).

Received 2022-3-29
Accepted 2022-6-9
Published 2022-6-21

Citation styles

Chien, H.W., Lin, C.W., Lee, C.Y., Huang, J.Y., Yang, S.F., Wang, K. (2022). The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study. International Journal of Medical Sciences, 19(7), 1103-1109.

Chien, H.W.; Lin, C.W.; Lee, C.Y.; Huang, J.Y.; Yang, S.F.; Wang, K. The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study. Int. J. Med. Sci. 2022, 19 (7), 1103-1109. DOI: 10.7150/ijms.73417.

Chien HW, Lin CW, Lee CY, Huang JY, Yang SF, Wang K. The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study. Int J Med Sci 2022; 19(7):1103-1109. doi:10.7150/ijms.73417.

Chien HW, Lin CW, Lee CY, Huang JY, Yang SF, Wang K. 2022. The use of androgen deprivation therapy for prostate cancer and its effect on the subsequent dry eye disease: a population-based cohort study. Int J Med Sci. 19(7):1103-1109.

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