Table 3. Compliance with temperature monitoring and reporting in persons who had contact with a person with Marburg hemorrhagic fever, the Netherlands, 2008*.

Variable	High-risk group score, mean (SD)	Low-risk group score, mean (SD)	p value†
Temperature monitoring week
1	4.87 (0.63)	4.25 (1.16)	0.004
2	4.87 (0.63)	3.84 (1.30)	<0.0001
3	4.82 (0.68)	3.34 (1.54)	<0.0001
Temperature reporting week
1	4.73 (1.01)	1.56 (1.37)	<0.0001
2	4.73 (1.01)	1.50 (1.34)	<0.0001
3	4.71 (1.01)	1.50 (1.34)	<0.0001

*Answers were given on a 5-point Likert scale, according to the following categories: 1, never; 2, seldom; 3, sometimes; 4, often; 5, always. High-risk contact, unprotected contact with the patient or her body fluids; low-risk contact, contact with the patient or her body fluids while following strict isolation measures.
†By 2-sample Student t test assuming unequal variances. Because of the relatively large sample sizes of 45 and 32 and data that consisted of scores from 1 through 5 with the indicated SDs, this test is justified by the central limit theorem and because the t distribution with 75 = 45 + 32 – 2 df is almost identical with that of a normal distribution. All p values were statistically significant (p<0.05).