ICU need (n %)  
Present n=21
n(%) Mean ± SD
Median (Min-Max)
Absent n=195
n(%) Mean ± SD
Median (Min-Max)
p
CURB-65=2
CURB-65>2
1 (0.46)
20 (9.26)
176 (81.48)
19 (8.80)
<0.0001b
PSI=3
PSI>3
0 (0)
21 (9.72)
167 (77.31)
28 (12.96)
<0.0001b
Age (years)
<65
≥65
5 (2.31)
16 (7.41)
65 (30.09)
130 (60.19)
0.376a
Gender
Male
Female
15 (6.94)
6 (2.78)
102 (47.22)
93 (43.06)
0.095a
BUN (mg/dl) 23.08 ± 13.5
19.65(7.63-56.51)
19.11 ± 10.85
15.96(4.68-76.48)
0.198 d
Albumin (g/dl) 3.24 ± 0.49
3.23(2.43-4.25)
3.66 ± 0.52
3.61(2.25-5.07)
<0.0001c
BUN/Alb 7.13 ± 4.3
5.26(2.68-18.65)
5.35 ± 3.45
4.19(1.57-25.66)
0.029 d
ICU: Intensive care unit, CURB-65: Confusion, urea nitrogen, respiratory rate, blood pressure, ≥65 years, PSI: Pneumonia severity index, SD: Standard deviation, BUN: Blood urea nitrogen, BUN/Alb: Blood urea nitrogen/ albumin, a: p value was based on Chi-Square test, b: p value was based on Fisher’s Exact Test, c: p value was based on Student’s t-test, d: p value was based on Mann Whitney U test.
Table 6: The factors influencing the need for intensive care unit.