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. 2017 Nov 14;12(11):e0187024. doi: 10.1371/journal.pone.0187024

Table 3. Comparison of parasite detection rates of slit skin smear and IC-RDT with different variables.

Type of investigation Positive Negative Sensitivity Total Chi-square value DF P value
Detection by SSS vs duration of lesion
< 4 months 25 10 71% (25/35) 35 0.092 1 0.76
> 4months 18 6 72% (18/24) 24
Total 43 16 59
Detection by SSS vs type of lesion
Nodules & ulcers 37 14 73% (37/51) 51 0.021 1 0.89
Others: Papule, plaque, satellite lesions 6 2 75% (6/8) 8
Total 43 16 59
Detection by SSS vs site of lesion
Head & neck 7 1 88% (7/8) 8 1.74 2 0.42
Trunk 4 3 57% (4/7) 7
Limbs (upper & lower) 32 12 73% (32/44) 44
Total 43 16 55
Detection by IC-RDT vs duration of lesion
< 4 months 10 25 10/35 (29%) 35 1.85 1 0.17
> 4months 11 13 11/24 (46%) 24
Total 21 38 59
Detection by IC-RDT vs duration of lesion
Nodules & ulcers 16 35 31% (16/51) 51 2.92 1 0.09
Others; Papule, plaque, satellite lesions 5 3 63% (5/8) 8
Total 21 38 59
Detection by IC-RDT vs site of lesion
Head & neck 3 5 38% (3/8) 8 0.18 2 0.92
Trunk 2 5 29% (2/7) 7
Limbs (upper & lower) 16 28 36% (16/44) 44
Total 21 59