| Application of BR algorithms |
|
Number of algorithms assessed
|
| 1 |
94 (48.0) |
| 2–5 |
76 (38.8) |
| 6–10 |
17 (8.7) |
| 11–15 |
6(3.1) |
| ≥ 16 |
3 (1.5) |
|
Input signal(s)
|
| ECG |
98 (50.0) |
| PPG |
112(57.1) |
| Fusion of ECG and PPG |
5 (2.6) |
| Pulse transit time |
8 (4.1) |
|
Window duration [s]
|
| < 30 |
10(5.1) |
| 30–59 |
46 (23.5) |
| 60–89 |
50 (25.5) |
| ≥ 90 |
10(5.1) |
| Unknown |
78 (39.8) |
| Datasets |
|
Age(s) of subjects [years]
|
| 0–0.1: Neonate |
5 (2.6) |
| 0.1–17: Pediatric |
27 (13.8) |
| 18–39: Young adult |
122 (62.2) |
| 40–69: Middle-aged adult |
76 (38.8) |
| ≥ 70: Elderly adult |
50 (25.5) |
| Unknown |
57 (29.1) |
|
Level(s) of illness
|
| Healthy |
127 (64.8) |
| Sick in community |
22(11.2) |
| Acutely ill |
15 (7.7) |
| Critically ill |
52 (26.5) |
| unknown |
9 (4.6) |
|
Type(s) of breathing
|
| Spontaneous |
150 (76.5) |
| Metronome |
45 (23.0) |
| Ventilated |
32 (16.3) |
| Simulated |
7 (3.6) |
| unknown |
25 (12.8) |
|
Number of datasets used
|
| 1 |
164 (83.7) |
| 2 |
30 (15.3) |
| 3 |
1 (0.5) |
| 4 |
1 (0.5) |
| Comparison with reference BRs |
|
Reference BR equipment
|
| Air flow or pressure |
45 (23.0) |
| Impedance pneumography (ImP) |
48 (24.5) |
| Capnography |
33 (16.8) |
| Inductance plethymography (InP) |
14(7.1) |
| Piezoelectric |
9 (4.6) |
| Strain gauge |
19 (9.7) |
| Metronome |
9 (4.6) |
| Other |
22(11.2) |
| None |
5 (2.6) |
| unknown |
26 (13.3) |
|
Common statistical measures
|
| Error statistic |
127 (64.8) |
| Breath detection statistic |
19 (9.7) |
| Bias |
46 (23.5) |
| Limits of agreement (LOAs) |
46 (23.5) |
| Correlation |
27 (13.8) |
| Proportion of windows |
14(7.1) |
