. 2015 Nov 18;9(11):e0004199. doi: 10.1371/journal.pntd.0004199

Table 5. Positive predictive values (PPVs), negative predictive values (NPVs), sensitivity, specificity and likelihood ratios of clinical features used to distinguish patients of the APCF of the EWMSC, T&T (Dec 2013 –Nov 2014) with DF ^ⱡ infection from patients with CHIKF ^ⱡ .

Parameters	Sens (%)	Spec (%)	PPV (%)	NPV (%)
Platelet count (<150x10³/μl), abdominal pain	7.3	96.3	75.0	40.6
Joint pain, rash	72.7	82.1	53.3	91.4
Joint pain, white blood cell count (<7x10³/μl)	91.7	50.0	37.9	94.7
White blood cell count (<7x10³/μl), rash	50.0	84.4	53.3	82.6
White blood cell count (<7x10³/μl), rash, joint pain	87.5	78.3	58.3	94.7

^ⱡ Defined as a positive result by RT-qPCR and/or positive for IgM/IgG antibodies by ELISA

Table 5. Positive predictive values (PPVs), negative predictive values (NPVs), sensitivity, specificity and likelihood ratios of clinical features used to distinguish patients of the APCF of the EWMSC, T&T (Dec 2013 –Nov 2014) with DF ⱡ infection from patients with CHIKF ⱡ .