Table 3.
Background Characteristics and Clinical Findings for Patients With SIPE From 2017 Through 2019
| Variable | Patients With SIPE (n = 165) |
|
|---|---|---|
| Women (n = 149) | Men (n = 16) | |
| Age, y | 48 ± 10 | 53 ± 11 |
| Age group, No (%) | ||
| 18-30 y | 9 (6) | 0 |
| 31-40 y | 22 (15) | 3 (19) |
| 41-50 y | 63 (42) | 2 (13) |
| 51-60 y | 42 (28) | 6 (38) |
| > 61 y | 13 (9) | 5 (31) |
| Weight, kg | 66 (62-74)a | 80 (79-86)b |
| Length, m | 168.3 ± 5.6a | 181.3 ± 6.1b |
| BMI, kg/m2 | 23.1 (21.7-25.9)a | 24.9 (24.1-27.4)b |
| Medical history, No (%) | ||
| Smoker | 1 (1) | 1 (6) |
| Asthma | 29 (19) | 1 (6) |
| Heart disease | 5 (3) | 1 (6) |
| Hypertension | 16 (11) | 6 (38) |
| Factors concerning the race, No (%) | ||
| Wearing a wetsuit, any type | 145 (98)b | 16 (100) |
| Distance, No (%) | ||
| 1,000 m | 66 (44) | 0 (0) |
| 1,500 m | 17 (11) | 3 (19) |
| 3,000 m | 66 (44) | 13 (81) |
| Discontinuation of the race | 65 (44) | 8 (50) |
| Distance swum before discontinuation, m | 750 (450-1,700) | 875 (500-1,475) |
| Aspiration or swallowing of water during the racec | 67 (45)b | 7 (44) |
| Symptoms, No. (%) | ||
| Cough only | 23 (16) | 0 |
| Dyspnea with or without cough | 78 (54) | 11 (73) |
| Increased sputum and/or hemoptysis | 46 (32) | 4 (27) |
| Clinical findings | ||
| Body temperature, °C | 36.0 (35.0-36.6)d | 36.7 (35.7-37.1)e |
| Spo2, % | 92 (89-95)f | 90 (89-92)b |
| Crackles on lung auscultation, No. (%) | 120 (81)b | 11 (69) |
Continous data are presented as mean ± SD, or median (interquartile range). Categorical data are presented as No (%). SIPE = swimming-induced pulmonary edema; Spo2 = peripheral oxygen saturation.
a
Data missing for four swimmers.
b
Data missing for one swimmer.
c
The patients reported if they experienced a “kallsup” (in Swedish) during the race, which translates to both aspiration and swallowing of water.
d
Data missing for 58 swimmers.
e
Data missing for seven swimmers.
f
Data missing for two swimmers.