TABLE 8.
Relationship Between a Presence-Absence Index of All Six Fecal Indicators in Sand and Enteric Illness by Sand Contact Type.
| GI Illness
|
Diarrhea
|
|||
|---|---|---|---|---|
| No. (%)a | aOR (95% CI)b | No. (%)a | aOR (95% CI)b | |
| Digging in sand | (n= 4672) | (n = 4706) | ||
| Not digging d | 182 (5) | 1.00 | 115 (3) | 1.00 |
| Digging | ||||
| fecal index | ||||
| tertile 1 | 38 (9) | 1.32 (0.83–2.10) | 27 (6) | 1.48 (0.89–2.47) |
| tertile 2 | 41 (9) | 1.59 (1.01–2.50) | 28 (6) | 1.76 (1.07–2.90) |
| tertile 3 | 33 (8) | 1.33 (0.82–2.13) | 26 (7) | 1.69 (0.98–2.93) |
| Test for trende | P=0.06 | P=0.01 | ||
| Buried in sand | (n= 4675) | (n = 4709) | ||
| Not buried d | 274 (6) | 1.00 | 181 (4) | 1.00 |
| Buried | ||||
| fecal index | ||||
| tertile 1 | 4 (5) | 0.59 (0.21–1.65) | 2 (2) | 0.44 (0.11–1.74) |
| tertile 2 | 7 (11) | 1.89 (0.81–4.41) | 5 (8) | 2.14 (0.72–6.34) |
| tertile 3 | 9 (16) | 2.16 (0.75–6.19) | 8 (14) | 2.92 (0.91–9.37) |
| Test for trende | P=0.12 | P=0.07 | ||
a
The numbers are participants reporting new symptoms, among those without baseline symptoms.
b
Robust variance estimates clustering on household.
c
The numbers are participants with complete information on age, sex, race/ethnicity, beach, and any contact swimming, among those without baseline symptoms.
d
Reference category.
e
P value from a linear trend test across the non-sand-exposed to the highest sand-exposed category.
aOR estimated from logistic regression model adjusted for age, sex, race/ethnicity, beach, and any contact swimming.