Phindu lofunika kwambiri (PPV) limakuuzani momwe mwakhalira kuti muli ndi matenda ngati mutayesa zowonjezera. Zimatanthauzidwa ngati chiwerengero cha zabwino zenizeni (anthu omwe amayesa odwala omwe ali ndi matendawa) ndigawidwa ndi chiŵerengero cha anthu omwe amayesa chitsimikizo. Zimasiyana ndi kuyesayesa, kuyesa, komanso kufalitsa matenda.
Mukhoza kuwona momwe izi zimasinthira PPV ya test mu chitsanzo chapafupi. PPV ndi chinthu chovuta kwa madokotala kuti aganizire, zomwe zingakhale zovuta kwa odwala. Komabe, zimatengera kwambiri kufala kwa matenda m'midzi kumene amagwira ntchito. Kudziwa kukhudzidwa ndi zenizeni sikokwanira kunena zomwe PPV ili. Muyeneranso kukhala ndi lingaliro labwino momwe matendawa aliri kuti mukuyesedwa.
Zitsanzo
Taganizirani kuti mayeso a chlamydia ali ndi 80% othandizira & 80% enieni. Mu chiwerengero cha anthu 100 omwe ali ndi chlamydia kuchuluka kwa 10%:
8/10 zabwino zenizeni zidzayesa zabwino
72/90 zolakwika zenizeni zidzayesa zolakwika
Pa mayesero 26 abwino, 8 ndizoona zowona. 18 ndi zabodza . Choncho, chitsimikizo choyenera (PPV) chidzakhala 31% (8/26). Gawo limodzi lokha la anthu omwe amayesa chithandizo lingakhale ndi chlamydia.
Komabe, ngati kuchuluka kwa chlamydia kunali 30%:
24/30 zabwino zenizeni zingayesetse zabwino
56/70 zolakwika zenizeni zingayese zolakwika.
Pachikhalidwe ichi, PPV idzakhala 24/38 = 63%. Awiri mwa magawo atatu mwa anthu omwe amayesedwa bwino angakhale ndi zotsatira zoyesedwa.
Bwanji za mayeso omwe ali 80% sens. ndi 95% enieni. mu 20%?
16/20 woona + adzayesa +
76/80 woona - adzayesa -
Ndipo PPV idzakhala 16/20 = 80%
Zinthu Zowonjezera PPV
Kuwonjezeka kwa chiwerengero cha zabwino zenizeni ndi mayeso PPV amafuna chimodzi kapena zonse ziwiri. Chiyeso chikhoza kukhala ndipamwamba kwambiri. Anthu ambiri omwe alibe chlamydia angayesere zoipa. Ndiye, pangakhale zotsalira zonyenga. Chinthu china chimene chimawonjezera mayeso PPV ndipamwamba kwambiri.
Chiwerengero chachikulu cha anthu omwe ali ndi kachirombo ka HIV, ndi apamwamba kwambiri.
Kawirikawiri, aliyense angakonde kuwonjezerapo mayeso. Kukhala ndi anthu ambiri akudwala kuti pokhapokha kupititsa patsogolo kuyesedwa kwachidziwitso kumakhala kovuta.