Table 1 Detection of anti-DENV IgM by two commercial ELISA tests at initial survey, 6 and 12 months
From: Prolonged persistence of IgM against dengue virus detected by commonly used commercial assays
No. DENV IgM positive/total (%)a | ||||||
|---|---|---|---|---|---|---|
Initial | 6 months later | 12 months later | ||||
SDb | Focusc | SDb | Focusc | SDb | Focusc | |
All | 44/44 (100.0) | 40/44 (90.9) | 31/44 (70.5) | 6/44 (13.6) | 18/39 (46.2) | 3/39 (7.7) |
p-valued | < 0.0001 | < 0.0001 | ||||
Age | ||||||
20–50 | 12/12 (100.0) | 8/12 (66.7) | 9/12 (75.0) | 2/12 (16.7) | 5/10 (50.0) | 1/10 (10.0) |
51–60 | 16/16 (100.0) | 16/16 (100.0) | 12/16 (75.0) | 2/16 (12.5) | 7/16 (43.8) | 1/16 (6.3) |
> 60 | 16/16 (100.0) | 16/16 (100.0) | 10/16 (62.5) | 2/16 (12.5) | 6/13 (46.2) | 1/13 (7.7) |
p-valued | – | – | 0.7676 | > 0.9999 | > 0.9999 | > 0.9999 |
Sex | ||||||
Male | 7/7 (100.0) | 7/7 (100.0) | 6/7 (85.7) | 1/7 (14.3) | 2/5 (40.0) | 1/5 (20.0) |
Female | 37/37 (100.0) | 33/37 (89.2) | 25/37 (67.6) | 5/37 (13.5) | 16/34 (47.1) | 2/34 (5.9) |
p-valued | – | – | 0.6542 | > 0.9999 | > 0.9999 | 0.3452 |
Initial IgM levele | ||||||
> Median | 22/22 (100.0) | 22/22 (100.0) | 19/22 (86.4) | 5/22 (22.7) | 12/19 (63.2) | 3/19 (15.8) |
< Median | 22/22 (100.0) | 18/22 (81.8) | 12/22 (54.5) | 1/22 (4.5) | 6/20 (30.0) | 0/20 (0.0) |
p-value§ | – | – | 0.0452 | 0.1853 | 0.0562 | 0.1060 |
Diagnosed cases | ||||||
Yes | 17/17 (100.0) | 16/17 (94.1) | 11/17 (64.7) | 1/17 (5.9) | 7/15 (46.7) | 1/15 (6.7) |
No | 27/27 (100.0) | 24/27 (88.9) | 20/27 (74.1) | 5/27 (18.5) | 11/24 (45.8) | 2/24 (8.3) |
p-valued | – | – | 0.5205 | 0.3801 | > 0.9999 | > 0.9999 |