| Wang score | ||||
| 0 | 1 | 2 | 3 | |
| Respiratory rate breaths·min−1 | <30 | 31–45 | 46–60 | >60 |
| Wheezing | None | Terminal expiration or only with stethoscope | Entire expiration or audible on expiration without stethoscope | Inspiration and expiration without stethoscope |
| Retractions | None | Intercostal only | Tracheosternal | Severe with nasal flaring |
| General condition | Normal | Irritable, lethargic, poor feeding | ||
Reproduced from [36] with permission from the publisher.