Table 3 Incidence rates of and predictors for acquiring 2nd or later TD episodes among 597 travellers in a prospective cohort from the Netherlands to developing countries, October 2006 - October 2007
Diarrhoea | Â | Subsequent episodes | Person-days of travel | Crude Incidence Rate per 100 travel days (95%CI) | Incidence Rate Ratio, univariate (95%CI) | P value | Incidence Rate Ratio, multivariate (95%CI) | P value |
|---|---|---|---|---|---|---|---|---|
Total | Â | 184 | 6690 | 2.75 (2.38 - 3.18) | Â | Â | Â | Â |
Sex | Â | Â | Â | Â | Â | Â | Â | Â |
| Â | Male | 57 | 2687 | 2.12 (1.64 - 2.75) | 1.00 | 0.010 | 1.00 | 0.009 |
| Â | Female | 127 | 4003 | 3.17 (2.67 - 3.78) | 1.50 (1.09 - 2.04) | Â | 1.50 (1.10 - 2.05) | Â |
Age group, years | Â | Â | Â | Â | Â | Â | Â | |
| Â | 18-30 | 80 | 2945 | 2.72 (2.18 - 3.38) | 1.00 | 0.534 | 1.00 | 0.504 |
| Â | 31-45 | 45 | 1824 | 2.47 (1.84 - 3.30) | 0.91 (0.63 - 1.31) | Â | 0.93 (0.65 - 1.34) | Â |
| Â | 46-80 | 59 | 1921 | 3.07 (2,38 - 3,96) | 1.13 (0.81 - 1.58) | Â | 1.16 (0.83 - 1.63) | Â |
Country of birth | Â | Â | Â | Â | Â | Â | Â | |
| Â | Netherlands | 168 | 6091 | 2.76 (2.37 - 3.21) | 1.00 | 0.555 | Â | Â |
| Â | Other Western country | 10 | 294 | 3.40 (1.83 - 6.32) | 1.23 (0.65 - 2.33) | Â | Â | Â |
| Â | Non-Western country | 6 | 305 | 1.97 (0.88 - 4.38) | 0.71 (0.32 - 1.61) | Â | Â | Â |
Primary purpose of travel | Â | Â | Â | Â | Â | Â | Â | |
| Â | Tourism | 156 | 5649 | 2.76 (2.36 - 3.23) | 1.00 | 0.658 | Â | Â |
| Â | Work or education | 24 | 823 | 2.92 (1.96 - 4.35) | 1.06 (0.69 - 1.62) | Â | Â | Â |
| Â | Visiting friends and/or relatives | 4 | 218 | 1.84 (0.69 - 4.89) | 0.66 (0.25 - 1.79) | Â | Â | Â |
Previous travel to a developing country | Â | Â | Â | Â | Â | Â | Â | |
| Â | Never | 25 | 1344 | 1.86 (1.26 - 2.75) | 1.00 | 0.069 | Â | Â |
| Â | 1 to 5 times | 122 | 4082 | 2.99 (2.50 - 3.57) | 1.61 (1.05 - 2.47) | Â | Â | Â |
| Â | 6 times or more | 37 | 1264 | 2.93 (2.12 - 4.04) | 1.57 (0.95 - 2.61) | Â | Â | Â |
Travel destination | Â | Â | Â | Â | Â | Â | Â | |
Latin America | South America | 27 | 875 | 3.09 (2.12 - 4.50) | 1.00 | 0.064 | Â | Â |
| Â | Central America and Caribbean | 8 | 472 | 1.70 (0.85 - 3.39) | 0.55 (0.25 - 1.21) | Â | Â | Â |
Africa | Southern and Eastern Africa | 29 | 1098 | 2.64 (1.84 - 3.80) | 0.86 (0.51 - 1.45) | Â | Â | Â |
| Â | Middle, Western and Northern Africa | 26 | 532 | 4.89 (3.33 - 7.18) | 1.58 (0.92 - 2.71) | Â | Â | Â |
Asia | South-Eastern and Eastern Asia | 69 | 2625 | 2.63 (2.08 - 3.33) | 0.85 (0.55 - 1.33) | Â | Â | Â |
| Â | South-Central and Western Asia | 18 | 871 | 2.07 (1.30 - 3.28) | 0.67 (0.37 - 1.22) | Â | Â | Â |
Several regions | Several regions | 7 | 199 | 3.52 (1.68 - 7.38) | 1.14 (0.50 - 2.62) | Â | Â | Â |