Characteristic | N | Cases | Controls | Combined | P-value |
---|---|---|---|---|---|
 |  | (n = 119) | (n = 119) | (n = 238) |  |
Agec | 238 | 44.7 (30.8, 58.2) | 46.8 (29.8, 56.8) | 46.2 (30.4, 57.8) | 0.651a |
Female gender (%) | 238 | 35 (29) | 33 (28) | 68 (29) | 0.883b |
Smoking (%) | 194 | Â | Â | Â | 0.370b |
Never | Â | 36 (35) | 30 (33) | 66 (34) | Â |
Former | Â | 8 (8) | 3 (3) | 11 (6) | Â |
Current | Â | 60 (58) | 57 (63) | 117 (60) | Â |
Diabetes (%) | 238 | 16 (13) | 16 (13) | 32 (13) | 1b |
Summer season (%) | 238 | 48 (40) | 48 (40) | 96 (40) | 1b |
Day length hours (IQR)c | 238 | 12.6 (10.8, 13.8) | 12.6 (10.7, 13.9) | 12.6 (10.8, 13.9) | 0.331a |
APACHE II score (IQR) | 238 | 26.0 (21.5, 29.5) | 24.0 (19.0, 27.5) | 25.0 (20.0, 29.0) | 0.078a |
ISSc (IQR) | 204 | 29.0 (24.0, 35.8) | 29.0 (22.0, 36.0) | 29.0 (23.5, 36.0) | 0.993a |
Number of non-pulmonary organ failures (%) | 238 | Â | Â | Â | 0.645a |
0 | Â | 42 (35) | 49 (41) | 91 (38) | Â |
1 | Â | 61 (51) | 52 (44) | 113 (47) | Â |
2 | Â | 13 (11) | 15 (13) | 28 (12) | Â |
3 | Â | 3 (3) | 3 (3) | 6 (3) | Â |
Days of ICU stay (IQR) | 238 | 11.0 (7.0, 18.5) | 9.0 (5.0, 16.0) | 10.0 (6.0, 18.0) | 0.155a |
Hospital mortality (%) | 238 | 10 (8) | 13 (11) | 23 (10) | 0.663b |
One-year mortality (%) | 238 | 20 (17) | 25 (21) | 45 (19) | 0.511b |
Risk factors for ALI/ARDS | 235 | Â | Â | Â | Â |
Severe trauma | Â | 116 (99) | 116 (99) | 232 (99) | Â |
Aspiration | Â | 2 (2) | 0 (0) | 2 (1) | Â |
Other or Noned | Â | 0 (0) | 1 (1) | 1 (1) | Â |
Patients on ventilator | Â | 115 (97) | 115 (97) | 230 (97) | 1b |
25-OHD (nmol/L) (IQR) | 237 | 54.9 (38.3, 72.5) | 50.8 (36.9, 69.8) | 53.4 (37.2, 71.9) | 0.302a |
Vitamin D Status (%) | 237 | Â | Â | Â | 0.606b |
Deficiency (< 50 nmol/L) | Â | 54 (45) | 59 (50) | 113 (48) | Â |
Insufficiency (50 to 75 nmol/L) | Â | 37 (31) | 38 (32) | 75 (32) | Â |
Sufficiency (> 75 nmol/L) | Â | 28 (24) | 21 (18) | 49 (21) | Â |