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Table 2 List of the independent variables considered for the regression analysis

From: The influence of APACHE II score on the average noise level in an intensive care unit: an observational study

Independent variables

Levels

Per patient

Room number

A(1), B(3), C(4), D(2), E(2), F(2), G(6) and H(2)

 

Gender

Male(9) and female(13)

 

Age

34~80; mean 57.3

 

ICU admission type

Medical(10), surgery(9) and trauma(3)

 

APACHE II

9~34; mean 19.0

Per day

IsWeekend

Weekday(69) and weekend(19)

 

Day count

1,2,3 and 4

 

(Day count) 2

1,4,9 and 16

 

(Day count) 3

1,8,27 and 64

  1. The number in parenthesis for each level indicates the number of the corresponding patients and samples for the per-patient and per-day variables, respectively.