Table 2.
Prevalence and performance of Paracheck® by age group, month of data collection and area
| Microscopy prevalence | ST + (n) | Sensitivity (%) | ST- (n) | Specificity (%) | DA (%) | Youden index (%) | ||
|---|---|---|---|---|---|---|---|---|
| Area |
|
|
|
|
|
|
|
|
| |
Ouagadougou |
18.1 |
68 |
80.9 |
308 |
73.7 |
75 |
55 |
| |
Small cities |
37.2 |
242 |
88.0 |
408 |
63.7 |
73 |
52 |
| |
Rural areas |
73.0 |
3823 |
90.2 |
1411 |
41.5 |
77 |
32 |
| |
p-value |
|
|
0.024 |
|
<0.001 |
|
|
| Age group (months) |
|
|
|
|
|
|
|
|
| |
6 - 12 |
58.6 |
467 |
89.1 |
330 |
54.8 |
75 |
44 |
| |
13 - 23 |
61.9 |
775 |
89.0 |
478 |
52.1 |
75 |
41 |
| |
24 - 35 |
66.0 |
923 |
91.2 |
476 |
54.2 |
76 |
45 |
| |
36 - 47 |
70.4 |
1007 |
92.3 |
424 |
51.7 |
80 |
44 |
| |
48 - 59 |
69.7 |
961 |
87.4 |
417 |
49.2 |
76 |
37 |
| |
p-value |
|
|
0.004 |
|
0.10 |
|
|
| Month of data collection* |
|
|
|
|
|
|
|
|
| |
May** |
20.0 |
30 |
93.3 |
120 |
73.3 |
77 |
67 |
| |
June** |
31.6 |
66 |
83.3 |
143 |
69.2 |
74 |
53 |
| |
July |
74.0 |
376 |
89.6 |
132 |
36.4 |
76 |
26 |
| |
August |
70.9 |
795 |
88.6 |
327 |
47.1 |
76 |
36 |
| |
September |
73.3 |
869 |
88.3 |
317 |
44.2 |
76 |
32 |
| |
October |
63.4 |
688 |
89.5 |
398 |
49.5 |
75 |
39 |
| |
November |
66.3 |
838 |
91.8 |
426 |
44.6 |
76 |
36 |
| |
December |
64.1 |
465 |
93.8 |
260 |
59.2 |
81 |
53 |
| p-value*** | 0.009 | <0.001 | ||||||
*Only seven children were tested in January, **Result for the Central region only, ***Comparison between July and December, ST+: positive blood smear test, ST-: negative blood smear test, DA: Diagnosis accuracy.