SDC #4
Tabular Results for Figures 1-6.
Table A3.1.1 Figure 1. Impact of Nurse-to-Patient Ratios in National ED.
Minimum
RN : Patient
1:2
Wait
Time
15
92
RN
(%)
60
Bed
(%)
27
1:3
15
108
77
32
1:4
16
134
85
40
1:5
23
168
90
50
Bedtime
Table A3.2. Figure 2. Impact of Nurse to Patient Ratios in High Acuity ED
Minimum
RN : Patient
1:2
Wait
Time
15
116
RN
(%)
64
Bed
(%)
34
1:3
15
142
83
42
1:4
17
168
88
49
1:5
22
181
88
56
Bedtime
2
Table A3.3. Results for Figure 3. Impact of Nurse to Patient Ratios on Mean Bed Time Over 24 Hour in
National ED
Bedtime
Time of
Day
00:00
Minimum RN : Patient
1:2
1:3
1:4
1:5
89
94
138
168
01:00
93
96
135
157
02:00
88
114
140
170
03:00
89
114
137
166
04:00
93
112
129
153
05:00
94
105
126
152
06:00
93
121
123
144
07:00
88
129
139
156
08:00
94
126
145
157
09:00
93
105
136
152
10:00
92
107
114
144
11:00
92
102
117
165
12:00
90
103
118
172
13:00
94
102
116
177
14:00
91
105
116
187
15:00
97
110
121
185
16:00
94
115
136
190
17:00
94
115
151
192
18:00
95
112
155
181
19:00
93
109
154
183
20:00
93
105
152
168
21:00
89
100
149
169
22:00
88
98
139
165
23:00
88
96
133
169
Mean
92
108
134
168
10%
88
97
116
152
50%
93
106
136
168
90%
94
119
152
186
3
Table A3.4. Results for Figure 4. Impact Adding Technicians (1) and Decreasing Physicians (2) on
Nurse-to-Patient Ratios in National ED
1:3 Nurse-to-Patient Ratio
Increased
Baseline
w/ Tech.
MD %
1:4 Nurse-to-Patient Ratio
Increased
Baseline
w/ Tech.
MD %
Wait
Time
Bedtime
15
15
15
16
15
16
108
99
127
134
107
145
RN (%)
77
68
77
85
75
85
Bed (%)
32
29
37
40
32
43
1.
Technicians performed ECG and blood draws and one technician was added for every six
nurses.
2.
The number of physicians per patients was decreased from one physician to three patients
(1:3) to one physician to six patents (1:6)
4
Table A3.5 Results for Figure 5. Impact of Crowding (1) on Different Nurse-to-Patient Ratios in
National ED
1:3 Nurse-to-Patient Ratio
Baseline Arrival Rate
Boarding
(2)
+10%
10-79-243
1:4 Nurse-to-Patient Ratio
Arrival Rate
Boarding
Baseline
+10%
10-79-243
Wait
Time
Bedtime
15
15
17
16
30
23
108
126
132
134
197
177
RN (%)
77
83
80
85
92
88
Bed (%)
32
40
38
40
61
49
1.
Crowding was simulated by either a 10% increase in hourly arrival rate or by increasing
boarding to the national levels of boarding (triangular distribution 10-79-243). (ref )
2.
Baseline had triangular distribution for boarding of 10-25-75.
5
Table A3.6 Results for Figure 6. Impact of Nurse to Patient Ratios in National ED with High Bed
Utilization (1)
1:3 Nurse-to-Patient Ratio
No.
Beds
Wait
Time
Bed
Time
RN (%)
Bed (%)
1:4 Nurse-to-Patient Ratio
Baseline
Reduced Beds (1)
Baseline
Reduced Beds (1)
34
17
34
17
15
28
16
83
108
113
134
152
77
77
85
84
32
65
40
79
1. Reduced beds results in higher bed utilization.