[Distribution of traditional Chinese medicine syndrome types of male infertility in Chengdu area].

Objective: To explore the distribution characteristics of the traditional Chinese medicine (TCM) syndrome types of male infertility in Chengdu area, China, in order to provide some objective evidence for the clinical treatment and studies of male infertility.

Methods: We collected the clinical data on 500 cases of male infertility treated in the outpatient and inpatient departments of the Affiliated Hospital of Chengdu University of Chinese Medicine and Chengdu Hospital for Reproduction, Women and Children from January to December 2017. Based on the results of examinations using the four diagnostic methods of TCM, namely, observation, auscultation and olfaction, interrogation, and palpation, we differentiated the TCM syndromes of the patients and analyzed the distribution characteristics of the syndrome types.

Results: Analysis of the baseline characteristics and the results of Chi-square test showed statistically significant differences in the distribution of the frequency of sexual intercourse, body mass index, history of urinary tract infection, testis volume, testicular texture, vas deferens and varicocele among the 500 patients (P < 0.05). As for the distribution of the TCM syndrome types, 115 cases (23.0%) were diagnosed with the unlicensed discernible type of syndrome, 109 (21.8%) with kidney-yang deficiency, 36 (7.2%) with kidney-essence deficiency, 30 (6.0%) with both kidney-yang deficiency and liver-qi stagnation, 30 (6.0%) with both kidney-yang deficiency and spleen-asthenia with excessive dampness, 28 (5.6%) with kidney-yin deficiency, 20 (4.0%) with spleen-asthenia and excessive dampness, 19 (3.8%) with liver-qi stagnation, 19 (3.8%) with phlegm dampness obstruction, 19 (3.8%) with kidney-yang and kidney-essence deficiency, 16 (3.2%) with downward damp-heat, 11 (2.2%) with both kidney-yin and kidney-yang deficiency, 10 (2.0%) with qi-stagnation and blood stasis, and 38 (7.6%) with other types of syndromes.

Conclusions: The main TCM syndrome types of male infertility in Chengdu area include kidney-yang deficiency, kidney-yang deficiency with liver-qi stagnation, and kidney-yang deficiency with spleen-asthenia and excessive dampness. The distribution and influencing factors of the syndrome types need to be further explored and clarified by more large-sample and high-quality studies.