Table 2 Unadjusted incident rate ratios (95 % confidence intervals) for outcomes of interest and selected covariates evaluating risk of functional gastrointestinal disorders following acute G. lamblia infection

Non-Caucasian

0.5 (0.2, 1.4)

1.2 (0.8, 1.8)

0.9 (0.3, 3.0)

0.4 (0.1, 2.9)

> High school education

1.5 (0.8, 3.0)

0.9 (0.6, 1.3)

0.8 (0.2, 2.7)

1.7 (0.5, 5.7)

Officer

1.6 (0.7, 3.3)

1.3 (0.9, 2.0)

1.8 (0.6, 5.1)

5.4 (0.7, 43.5)

Non-Army Service

1.8 (0.7, 4.4)

1.5 (1.0, 2.4)

2.3 (0.6, 9.8)

1.7 (0.4, 7.6)

Operational deployment

2.0 (0.7, 5.6)

1.0 (0.5, 2.2)

0.4 (0.1, 3.3)

0.7 (0.1, 7.6)

Axis I disorder

6.7 (3.7, 12.2)

4.0 (2.9, 5.6)

5.4 (1.7, 16.5)

18.4 (4.2, 81.1)

Bacterial or Viral Infection

5.9 (3.2, 10.9)

2.1 (1.3, 3.5)

3.8 (1.0, 15.2)

9.0 (2.7, 29.8)

G. lamblia

2.1 (1.1, 3.7)

1.1 (0.7, 1.6)

3.2 (1.2, 8.9)

1.3 (0.4, 4.8)