Characteristics | N | Fatigue | |||||||
---|---|---|---|---|---|---|---|---|---|
 |  | Not more than usual N (%) | More than usual N (%) | Much more than usual N (%) | Simple regression analysisa | Multiple regression analysisb | |||
 |  |  |  |  | OR | P-value | OR | p-value | 95% CI |
Gender | Â | Â | Â | Â | Â | Â | Â | Ns | Â |
   Male | 338 | 199 (59) | 107 (32) | 32 (10) | 1.00 |  | 1.00 |  |  |
   Female | 592 | 312 (53) | 199 (34) | 81 (14) | 1.32 | 0.038 | - |  |  |
Age c (years) | 930 | Â | Â | Â | 1.02 | <0.001 | 1.02 | 0.007 | (1.01, 1.03) |
Abdominal problems before 2004 leading to | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Visiting doctor | 114 | 49 (43) | 50 (44) | 15 (13) | 1.56 | 0.020 | - | Ns |  |
   Hospitalisation | 14 | 4 (29) | 8 (57) | 2 (14) | 2.21 | 0.113 | - | Ns |  |
   Sick leave | 17 | 6 (35) | 10 (59) | 1 (6) | 1.60 | 0.309 | - | Ns |  |
   Use of medication | 35 | 15 (43) | 18 (51) | 2 (6) | 1.31 | 0.414 | - | Ns |  |
   Problems without seeking health care | 95 | 45 (47) | 40 (42) | 10 (11) | 1.26 | 0.256 | 2.13 | 0.025 | (1.10, 4.15) |
No abdominal Problems before 2004 | 662 | 380 (57) | 198 (30) | 84 (13) | 0.78 | 0.081 | - | Ns | Â |
Acute giardiasis | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Diarrhoea | 839 | 456 (54) | 279 (33) | 104 (12) | 1.28 | 0.255 | - | Ns |  |
   Abdominal pain | 646 | 322 (50) | 236 (37) | 88 (14) | 1.95 | <0.001 | - | Ns |  |
   Weight loss | 506 | 255 (50) | 180 (36) | 71 (14) | 1.50 | 0.002 | - | Ns |  |
   Malaise | 714 | 334 (47) | 277 (39) | 103 (14) | 5.03 | <0.001 | 3.68 | <0.001 | (2.25, 6.01) |
   Nausea | 604 | 302 (50) | 215 (36) | 87 (14) | 1.81 | <0.001 | - | Ns |  |
   Foul smell | 580 | 290 (50) | 201 (35) | 89 (15) | 1.80 | <0.001 | - | Ns |  |
   Bloating | 622 | 311 (50) | 224 (36) | 87 (14) | 1.84 | <0.001 | - | Ns |  |
Treatment refractory infection d | 29 | 13 (45) | 11 (38) | 5 (17) | 1.52 | 0.236 | - | Ns | Â |
Treatment courses e | Â | Â | Â | Â | Â | Â | Â | <0.001 | Â |
   0 or 1 | 326 | 249 (76) | 68 (21) | 9 (3) | 1.00 |  | 1.00 |  |  |
   2 or more | 227 | 128 (56) | 77 (34) | 22 (10) | 2.55 | <0.001 | 1.98 | 0.002 | (1.28, 3.07) |
   Recovered during course but relapsed | 3 | 2 (67) | 1 (33) | 0 (0) | 1.50 | 0.742 | 2.37 | Ns | (0.19, 29.08) |
   Not recovered | 371 | 129 (35) | 160 (43) | 82 (22) | 6.39 | <0.001 | 6.20 | <0.001 | (4.16, 9.24) |
Sick leave e | Â | Â | Â | Â | Â | Â | Â | 0.001 | Â |
   No sick leave | 368 | 232 (63) | 106 (29) | 30 (8) | 1.00 |  | 1.00 |  |  |
   < 1 week | 58 | 30 (52) | 24 (41) | 4 (7) | 1.45 | 0.180 | 0.93 | Ns | (0.49, 1.77) |
   1-2 weeks | 98 | 63 (64) | 29 (30) | 6 (6) | 0.93 | 0.740 | 0.72 | Ns | (0.42, 1.23) |
   > 2 weeks | 150 | 55 (37) | 50 (33) | 45 (30) | 3.63 | <0.001 | 2.26 | <0.001 | (1.45, 3.53) |
   Not working | 232 | 125 (54) | 84 (36) | 23 (10) | 1.42 | 0.035 | 1.08 | Ns | (0.71, 1.63) |
Delayed education e | Â | Â | Â | Â | Â | Â | Â | 0.001 | Â |
   No delay | 291 | 205 (70) | 67 (23) | 19 (7) | 1.00 |  | 1.00 |  |  |
   < 1 semester | 66 | 31 (47) | 30 (46) | 5 (8) | 2.34 | 0.002 | 1.79 | 0.049 | (1.00, 3.19) |
   1 semester | 39 | 13 (33) | 17 (44) | 9 (23) | 4.64 | <0.001 | 2.80 | 0.004 | (1.39, 5.66) |
   > 1 semester | 35 | 8 (23) | 13 (37) | 14 (40) | 9.21 | <0.001 | 3.88 | <0.001 | (1.82, 8.30) |
   Not a student | 357 | 188 (53) | 121 (34) | 48 (13) | 2.17 | <0.001 | 1.51 | 0.033 | (1.03, 2.21) |