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Shang Ring Versus Forceps-Guided Adult Male Circumcision: A Randomized, Controlled Effectiveness Study in Southwestern Uganda

Kanyago, Samuel MBChB, MMed*,†; Riding, David M. MSc, MBChB, MRCS‡,§; Mutakooha, Elichum MMed, FCS*; Lopez de la O, Alcides MD*; Siedner, Mark J. MD, MPH*,‖

JAIDS Journal of Acquired Immune Deficiency Syndromes: October 1st, 2013 - Volume 64 - Issue 2 - p 130–133
doi: 10.1097/QAI.0b013e3182965d67
Rapid Communication

Abstract: Adult male circumcision (AMC) reduces HIV transmission, but uptake is limited in part by current surgical methods. We randomized HIV-uninfected men (n = 138) to receive Shang Ring (SR)– or forceps-guided AMC from a locally trained surgeon. In as-treated analyses, more SR procedures were completed within 10 minutes (79% versus 0%, P < 0.01) and more subjects reported high satisfaction (77% versus 58%, P = 0.03). Healing time and pain scores were similar, though minor complication rates were higher in SR subjects (56% versus 24%, P < 0.01). SR circumcision is a rapid and acceptable method of AMC and should be further evaluated to increase uptake of AMC.

*Department of Surgery, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda;

Good Shepherd Hospital, Siteki, Swaziland;

North West Deanery, Manchester, UK;

§Mbarara Regional Referral Hospital, Mbarara, Uganda; and

Massachusetts General Hospital Center for Global Health, Harvard Medical School, Boston, MA.

Correspondence to: Dr. Samuel Kanyago, MBChB, MMed, Good Shepherd Hospital, 3 Km, Siteki-Maphungwane Road, Siteki, Swaziland (e-mail:

M.J.S. received salary support from the Fogarty International Clinical Research Scholars and Fellows Program at Vanderbilt University (R24 TW007988), and NIH (T32 AI007433).

The authors have no conflicts of interest to disclose.

Received January 09, 2013

Accepted April 09, 2013

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Adult male circumcision (AMC) can reduce the incidence of HIV transmission by 40%–60% in sub-Saharan Africa (SSA).1–4 The World Health Organization (WHO) and Joint United Nations Program on HIV/AIDS advocate AMC for the reduction of HIV transmission in heterosexual men in 14 high-prevalence countries in the region,5 and others have demonstrated that AMC programs can be effectively delivered and cost effective from a societal perspective.6,7

Despite these recommendations, AMC uptake varies greatly but remains below target in most areas.8 Fear of pain and misinterpretation of the effects of AMC can discourage men from presenting for the procedure.9,10 Furthermore, operative methods of AMC that require formal surgical training and can be time consuming might limit uptake in low-income countries. It has been estimated that approximately 100 procedures are required to attain adequate training for safe and effective operative AMC.11

As such, the WHO has recommended development and testing of rapid, safe, and simple methods to facilitate broader implementation of AMC, with particular attention to usability by mid-level providers.12 The Shang Ring (SR) (Wuhu Santa Medical Devices Technology Co Ltd, Wuhu, China) aims to satisfy these criteria. Preliminary studies have shown it to be a feasible and acceptable method of AMC in SSA.13 We performed a randomized, controlled effectiveness study to compare the SR- with forceps-guided (FG) AMC in a publicly funded regional referral hospital with a locally trained surgeon in Mbarara, Western Uganda.

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Eligibility and Randomization

Adult male students attending Mbarara University (≥15 years) undergoing elective AMC were recruited from the surgical outpatient department of Mbarara Regional Referral Hospital, Uganda. Patient age, marital status, smoking history, and motive to seek AMC were recorded for each participant. Exclusion criteria included self-reported HIV infection, chronic paraphimosis, genital ulcers, penile carcinoma, filariasis, xerotica obliterans, balanitis, glans–prepuce adhesions, frenular scar tissue, or any urethral anatomical abnormality such as hypospadias or epispadias.

We performed unblinded, block randomization by study day. Consenting participants selected an opaque envelope from a box for randomization to SR or FG groups. All AMC procedures were performed by a locally trained surgeon who had performed over 100 previous FG procedures but who had no previous experience with the SR procedure.

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A single study surgeon performed all procedures in the hospital operating theaters. All devices were purchased directly from the company, which provided no funding and had no role in the design, conduct, or analysis of the study. In both study groups, participants were cleaned with povidone iodine solution and draped in a sterile fashion. Local anesthesia was administered to the dorsal penile nerve and penile ring blocks using 3 mg/kg of 1% lidocaine. Six Shang Ring sizes were available for the study (ring sizes C, D, E, F, G, and K, diameters 26–34 mm). The surgeon measured participants in the SR group to determine ring size. Patients for whom a suitable ring size was not available crossed over to the FG group but remained in the SR group for intention to treat analyses. An assistant measured operative time using a stopwatch. For the SR group, timing began as the ring began to be fitted and ceased when the foreskin had been excised. For the FG group, timing began at the first incision and ceased when the final suture was completed. Patients were discharged on the day of procedure, provided with sterile gauze dressings, and informed to change them twice daily until the first follow-up appointment.

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Assessments and Outcomes of Interest

The lead investigator performed unblinded postoperative assessments at 1 hour after the procedure and on the 3rd, 7th, 14th, and 21st postoperative days. Primary outcomes of interest were based on the WHO guidelines and included procedure time, pain scores (using 10-point visual analog scale), time to resumption of normal activity (defined as attendance at university classes), patient satisfaction taken at conclusion of follow-up (rated as "low," "average," "high," or "very high" and dichotomized as low/average or high/very high for analyses), and time to complete healing, defined as complete circumferential approximation of the skin at the previous preputial site without edema, erythema, or scabbing. All patients in the SR group returned and had outcomes assessed until complete healing, whereas 16 of 65 (25%) of FG participants failed to return before full healing. Those in the FG group who did not return were considered healed on the day of their next scheduled follow-up appointment (ie, a patient presenting for a day 3 visit but not for subsequent appointments was considered healed on study day 7). We considered a minor complication as one requiring assessment by a clinician, including any of the following: (1) SR slippage, (2) infection requiring antibiotics, or (3) any persistent complication on day 14. We considered a major complication any requirement for repeat operative management, bleeding, or infections requiring hospital admission or scarring disfigurement. Missing outcome data for patients in the FG group who did not return were allocated as favorable for the analysis of outcomes to bias estimates of a superiority of the SR toward the null. Thus, for patients in the FG group who did not return, we considered them to have high satisfaction and no minor or major complications.

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Statistical Analyses

We measured incidence rates of all outcomes and estimated relative risk for the SR versus FG groups by fitting Poisson regression models with robust errors. All analyses were initially performed using intention to treat analysis and were repeated with an as-treated analysis by reallocating the 7 participants who crossed into the FG group. All statistical analyses were performed using Stata Version 11 (Statacorp, College Station, TX).

We regarded patient satisfaction as the primary indicator of superiority between the 2 circumcision methods. To show an increase in high satisfaction between the 2 groups from 70% to 90% with a power of 80% and alpha of 0.05%, we required enrollment of 72 participants into each treatment group.

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Ethical Statement

The research proposal and informed consent process were reviewed and approved by the Institutional Review Board Committee at Mbarara University of Science and Technology. Patients who presented for circumcision but who did not consent to participate in the trial were offered FG AMC. SR devices were supplied by an independent third party with no affiliation to Wuhu Santa Medical Devices Technology Co Ltd, who had no involvement in the design, interpretation, or writing of this study. The study has been registered with (NCT01757938).

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One hundred thirty-eight adult male students presented to the surgical outpatient clinic requesting AMC between January and May 2011 and gave written informed consent (Fig. 1). Seventy-three and 65 patients were allocated to the SR and FG groups, respectively. The median age was 22 years [interquartile range (IQR) 21–23], and the majority of participants cited HIV prevention (55%) or general hygiene (41%) as their motive for seeking AMC.



Operative time was significantly shorter in the SR group, with 71.2% versus 0.0% of FG procedures complete within 10 minutes (P < 0.001) and 95.6% versus 81.5% complete within 30 minutes [relative risk (RR): 1.18, 95% confidence interval (CI): 1.04 to 1.33, P = 0.01; Table 1].



Pain scores on the day of procedure were slightly higher in the FG group (median 3/10, IQR 2–5) than in the SR group (median 1/10, IQR 0–4, P = 0.01 for difference). There were no significant differences in pain scores between the 2 groups at later time points, with 69.9% of SR patients versus 62.7% of FG patients pain free within 3 days (RR: 1.11, 95% CI: 0.87 to 1.43, P = 0.50). All patients in both the groups were pain free by the seventh postoperative day. Seventy four percent of patients in the SR group reported that they were highly satisfied with their procedure, compared with 60.0% of patients in the FG group, but this was not statistically significant (RR: 1.38, 95% CI: 0.94 to 2.02, P = 0.10).

No participants in either group suffered a major complication (repeat operative procedure, infection or bleeding requiring admission, or scarring disfigurement). The rate of minor complications was higher in the SR (57%) group than in the FG group (18%, RR: 3.11, 95% CI: 1.80 to 5.40, P < 0.01). In the SR group, minor complications included slippage (6%), infection (32%), and any 14-day complication (43%: 30% persistent wound, 4% infection, 4% minor bleeding, 3% suture discomfort, and 1% edema). In the FG group, minor complications were infection (8%) and any 14-day complication (17%: 8% persistent wound, 6% suture discomfort, and 3% infection). All infections resolved with use of oral antibiotics. Urinary retention or difficulty in passing urine was reported by 2 (3%) FG and 3 (4%) SR patients on day 3, but none sought medical assistance at the time. One participant in the SR group was noted to have significant penile sedema at the day 14 assessment, but this was successfully managed conservatively.

Time to complete healing was similar in the SR (median 14 days, IQR 8–18) and FG groups (median 13 days, IQR 8–14), with 12.3% versus 13.9%, 34.3% versus 50.8%, and 90.9% versus 95.4% fully healed by days 7, 14, and 21, respectively. There was no significant difference in time to healing by log rank testing (P = 0.08). Time to resumption of normal activity was significantly faster in the SR group, with 94.5% able to attend classes on the first postoperative day, compared with 50.8% of FG patients (RR: 1.86, 95% CI: 1.45 to 2.38, P < 0.01).

Seven participants randomized to SR underwent FG AMC because of unavailability in ring size [all required the larger ring sizes (size A = 36 mm)]. In as-treated analyses, 66 patients received SR and 72 underwent FG AMC. In this analysis, the difference in the overall rate of complications remained statistically significant (56.1% Shang Ring versus 23.6% FG, RR: 2.37, 95% CI: 1.49 to 3.79, P < 0.01). The proportion of satisfied patients was significantly higher in the SR (77.3%) versus FG groups (58.3%) (RR: 1.65, 95% CI: 1.04 to 2.60, P = 0.03). No other differences between the 2 groups significantly changed with this analysis.

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At a regional hospital in provincial Uganda, we found that SR-guided AMC was relatively rapid, enabled earlier return to normal activity, and produced similar patient satisfaction when compared with FG AMC. However, we also found that postoperative complications, and especially uncomplicated ring site infections, were significantly higher with the SR procedure. Importantly, our data are reflective of procedures performed by a local staff in a prototypical, publicly funded referral hospital in southwestern Uganda and thus an indication of the effectiveness of the device in settings where it might be of highest impact.

Our results corroborate those of other studies that have shown alternative methods of AMC to be a more timely procedure than standard surgical techniques previously advocated by the WHO.13–16 The relatively rapid procedure time along with its potential use by nonoperatively trained health professionals make it a potentially attractive option in high-demand communities with hyperendemic HIV prevalence and/or a shortage of professionally trained health-care workers. Future evaluations of its use by nonphysicians will elucidate its role further in these settings.

Higher levels of patient satisfaction and earlier return to normal activities with the Shang Ring suggest that it has the capacity to increase uptake in areas with low rates of AMC.7 Though previous studies have suggested that fear of pain associated with the procedure is partially responsible for poor uptake,9,10 we found that pain was modest with the SR procedure and completely resolved by day 7 in all participants. Median time to healing in our study (median 14 days) was somewhat faster than that reported elsewhere (median 20 days), though this might be because of differences in definition of full healing.17 Moreover, faster time to return to normal activities would have importance both for patient preference and secondary considerations related to lost work and education.

Conversely, we found a potentially concerning increased rate of complications in those undergoing SR AMC. This may reflect the operator's lack of experience with the device. Rates of complication may reduce over time as has been demonstrated in studies of traditional AMC, though this should be evaluated in the future.10 Importantly, none of our recorded complications required further surgical intervention or inpatient admission. However, careful attention to short- and long-term complications should be further considered, as these findings will be essential for programs considering implementation of the procedure in low-resource settings.

Our study was limited by the availability of Shang Ring sizes. We did not have the largest ring size (size A, 36 mm), which was required for 7 eligible participants randomized to the SR. Though results did not differ greatly in the as-treated analysis, this shortcoming served to highlight that a wide range of ring sizes must be available for an effective AMC service to be provided using this method. The study population was largely composed of young (median age 22), relatively healthy university students and thus might not reflect the expected operative outcomes of older populations or those with comorbidities. Our results highlight the need for further studies to undertake large-scale, randomized, controlled trials to compare Shang Ring with other rapid, simple AMC methods and traditional surgical AMC. Because of the large need and known limitations with current methods, a widely accepted, safe, and simple procedure performed by nonsurgeon health-care workers would allow broad adoption of AMC in SSA, where both its impact and barriers to use are greater.

In summary, we demonstrate that the SR AMC device is a rapid, simple method of AMC that might serve as an effective method of increasing the uptake and acceptability in resource-limited settings. Further studies to validate our findings and investigate both short- and long-term complication rates with repeated use should be pursued.

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1. Auvert B, Taljaard D, Lagarde E, et al.. Randomized, controlled intervention trial of male circumcision for reduction of HIV infection risk: the ANRS 1265 Trial. PLoS Med. 2005;2:e298.
2. Bailey RC, Moses S, Parker CB, et al.. Male circumcision for HIV prevention in young men in Kisumu, Kenya: a randomised controlled trial. Lancet. 2007;369:643–656.
3. Gray RH, Kigozi G, Serwadda D, et al.. Male circumcision for HIV prevention in men in Rakai, Uganda: a randomised trial. Lancet. 2007;369:657–666.
4. Siegfried N, Muller M, Deeks JJ, et al.. Male circumcision for prevention of heterosexual acquisition of HIV in men. Cochrane Database Syst Rev. 2009:CD003362.
5. WHO/UNAIDS. Joint strategic action framework to accelerate the scale-up of voluntary medical male circumcision for HIV prevention in Eastern and Southern Africa. 2011. Available at: Accessed March 16, 2013.
6. Lissouba P, Taljaard D, Rech D, et al.. A model for the roll-out of comprehensive adult male circumcision services in African low-income settings of high HIV incidence: the ANRS 12126 Bophelo Pele Project. PLoS Med. 2010;7:e1000309.
7. Njeuhmeli E, Forsythe S, Reed J, et al.. Voluntary medical male circumcision: modeling the impact and cost of expanding male circumcision for HIV prevention in eastern and southern Africa. PLoS Med. 2011;8:e1001132.
8. Joint United Nations Program on HIV/AIDS (UNAIDS). AIDS at 30: Nations at a Crossroads. Geneva, Switzerland: UNAIDS; 2011.
9. Gasasira RA, Sarker M, Tsague L, et al.. Determinants of circumcision and willingness to be circumcised by Rwandan men, 2010. BMC Public Health. 2012;12:134.
10. Lissouba P, Taljaard D, Rech D, et al.. Adult male circumcision as an intervention against HIV: an operational study of uptake in a South African community (ANRS 12126). BMC Infect Dis. 2011;11:253.
11. Kiggundu V, Watya S, Kigozi G, et al.. The number of procedures required to achieve optimal competency with male circumcision: findings from a randomized trial in Rakai, Uganda. BJU Int. 2009;104:529–532.
12. WHO framework for clinical evaluation of devices for male circumcision. 2012. Available at: Accessed March 16, 2013.
13. Barone MA, Ndede F, Li PS, et al.. The Shang Ring device for adult male circumcision: a proof of concept study in Kenya. J Acquir Immune Defic Syndr 2011;57:e7–e12.
14. Li HN, Xu J, Qu LM. Shang Ring circumcision versus conventional surgical procedures: comparison of clinical effectiveness. Zhonghua Nan Ke Xue. 2010;16:325–327.
15. Mutabazi V, Kaplan SA, Rwamasirabo E, et al.. HIV prevention: male circumcision comparison between a nonsurgical device to a surgical technique in resource-limited settings: a prospective, randomized, nonmasked trial. J Acquir Immune Defic Syndr. 2012;61:49–55.
16. Decastro B, Gurski J, Peterson A. Adult template circumcision: a prospective, randomized, patient-blinded, comparative study evaluating the safety and efficacy of a novel circumcision device. Urology. 2010;76:810–814.
17. Cheng Y, Peng YF, Liu YD, et al.. A recommendable standard protocol of adult male circumcision with the Chinese Shang Ring: outcomes of 328 cases in China. Zhonghua Nan Ke Xue. 2009;15:584–592.

HIV/AIDS; Uganda; sub-Saharan Africa; adult male circumcision; HIV prevention; acceptability; feasibility

© 2013 by Lippincott Williams & Wilkins