Page 312 - fbkCardioDiabetes_2017
P. 312

288                               South Asians With PCOS -
                                           Metabolic Risk in Future Generation



              Comparisons  with  other medical conditions  and gy-  Hypertension in PCOS
              naecological populations have also  yielded  partic-  In South  Asians,Interestingly, their larger  waist cir-
              ularly  low  scores  on psychological  well-being  and   cumference  is linked  to greater  IR but  not  hypertri-
              quality of life for women with PCOS
                                                                 glyceridemia.  We recommend a study of  pregnan-
              Overall, there has been a great paucity of research   cy-induced hypertension in women with PCOS from
              comparing the influence of ethnicity or cultural back-  differing  ethnic  origins.  This is likely  to shed more
              ground on HRQoL in women with PCOS. Two studies    light on the less understood long-term cardiovascular
              have tentatively explored this relationship. However,   risks of PCOS.
              this was inter-country research and the impact of cul-
              tural,  social and  economic  differences  between the  Metabolic risks & Hyperandrogenism of
              two countries is unexplained. Twenty percent of the   PCOS
              world’s population are South Asian.
                                                                 The  relationship  between HA  and metabolic pheno-
              The metabolic phenotypic differences  of PCOS ob-  type also shows ethnic variation. Yet, their hyperan-
              served in Asians include:                          drogenemia is independently associated with a five-
                                                                 fold risk  of developing  T2DM. However,  the direct
              •  Indigenous south  Asians, at a younger  age  and
                with a lower  BMI  (26 kg/m ) have greater  meta-  relationship  between metabolic  problems  and HA
                                          2
                bolic derangement than  older,  obese  white cau-  was not  mirrored  in the  cohort of indigenous south
                casians; their central obesity rather than BMI cor-  Asians their metabolic problems being similar among
                relating with metabolic manifestations;          all phenotypic subgroups of PCOS with and without
                                                                 HA.  In fact,  their degree  of obesity was noted  to
              •  However,  they  have the highest  prevalence  of   be related to the occurrence  of oligo-amenorrhea,  .
                MetS (50%)                                       women  with  obesity, where obesity  and  metabolic
                                                                 problems do not correlate in a linear fashion with HA.
              •  Indigenous Thai women with  PCOS (mean  BMI
                           2
                of  27 kg/m ) have similar  prevalence  of  MetS  to   Such variations based on ethnicity in the susceptibil-
                south Asians at a slightly older age.            ity of PCOS to metabolic derangement that is seem-
                                                                 ingly independent of the HA of PCOS must be noted,
              These  highlight that  central obesity  rather  than  BMI
              (based on standard cutoff  of 30  kg/m ) affects  the   in that the less apparent hirsutism must not discour-
                                                  2
              metabolic issues of PCOS in Asians; thus the need to   age  the practitioner from suspecting PCOS. There-
              measure waist circumference rather than BMI alone.  fore, utilizing an ethnic-appropriate cutoff level for FG
                                                                 and diagnostic definition of  PCOS must be  chosen
                                                                 in order  to optimally benefit individual  patients of a
              Low SHBG in PCOS
                                                                 given population, as well as for comparison of data
              Sex hormone-binding globulin (SHBG) is significantly   from different geographic regions and self-identified
              lower  in affected south Asians compared with  their   ethnicities.
              white European counterparts. Since SHBG is lowered
              by hyperinsulinemia and  considered  a surrogate   Ethnicity  is  a factor that  determines  the degree  of
              marker of IR,. Therefore, it is logical to encourage life-  hyperandrogenism  and warrants measuring  plasma
              style  modification and weight  reduction upon diag-  androgens, having defined the cutoff based on eth-
              nosis of PCOS in these ethnic groups, even though   nically matched  normal women  (women unaffected
              they have a ‘lower’ BMI.                           by PCOS). The degree  of obesity must  also be tak-
                                                                 en into account,  along  with its  impact on androgen
              Acanthosis Nigricans  &  Family  History  of  Diabetes   metabolism. This aspect needs further elucidation, in
              in PCOS                                            particular among differing ethnic groups.
              A common clinical sign of IR is acanthosis nigricans.
              A large cohort of Sri Lankan women with PCOS re-   Psychosocial Impact of PCOS
              vealed acanthosis nigricans as an important predictor   PCOS causes significant psychological distress  and
              of the MetS-complicating PCOS.  This  supports  the   leads to poor health-related Quality  of Life in wom-
              recommendation to adopt a policy of training primary   en due to their physical, reproductive and metabolic
              healthcare  givers  in Asia, on the need to evaluate   effects. While western women have poor QoL due to
              young woman complaining of irregular menses and    obesity, it is different in others, with the main cause
              HA  with or  without  infertility  for  PCOS, which  must   being  infertility  and hirsutism  among Arab  wom-
              also be perceived as a long-term metabolic risk.   en  and hirsutism in south Asians.  The  likely  cause
                                                                 may be sociocultural factors, with obesity being per-


                                                         GCDC 2017
   307   308   309   310   311   312   313   314   315   316   317