Table 1.
Patient Characteristics
| All (n=11 465) | 2011 (n=1377) | 2012 (n=1440) | 2013 (n=1736) | 2014 (n=2037) | 2015 (n=2372) | 2016 (n=2503) | |
|---|---|---|---|---|---|---|---|
| Age, y, median (IQR) | 67 (55–79) | 65 (53–77) | 66 (54–78) | 67 (55–79) | 68 (55–80) | 67 (56–79) | 67 (55–79) |
| Sex (%) | |||||||
| Male | 7431 (64.8) | 935 (67.9) | 912 (63.3) | 1131 (65.2) | 1316 (64.6) | 1546 (65.2) | 1591 (63.6) |
| Female | 4034 (35.2) | 442 (32.1) | 528 (36.7) | 605 (34.9) | 721 (35.4) | 826 (34.8) | 912 (36.4) |
| Race (%) | |||||||
| Chinese | 7750 (67.6) | 893 (64.9) | 984 (68.3) | 1225 (70.6) | 1349 (66.2) | 1587 (66.9) | 1712 (68.4) |
| Indian | 1259 (11.0) | 185 (13.4) | 146 (10.1) | 161 (9.3) | 209 (10.3) | 277 (11.7) | 281 (11.2) |
| Malay | 1796 (15.7) | 201 (14.6) | 222 (15.4) | 265 (15.3) | 362 (17.8) | 363 (15.3) | 383 (15.3) |
| Other | 660 (5.8) | 90 (7.1) | 88 (6.1) | 85 (4.9) | 117 (5.7) | 145 (6.1) | 127 (5.1) |
| Location type (%) | |||||||
| Residential | 8196 (71.5) | 985 (71.5) | 990 (68.8) | 1246 (71.8) | 1480 (72.7) | 1658 (69.9) | 1837 (73.4) |
| Nonresidential | 3269 (28.5) | 392 (28.5) | 450 (31.2) | 490 (28.2) | 557 (27.3) | 714 (30.1) | 666 (26.6) |
| Medical history (%) | |||||||
| Unknown | 803 (7.0) | 144 (10.5) | 111 (7.7) | 139 (8.0) | 110 (5.4) | 145 (6.1) | 154 (6.2) |
| Heart disease | 4163 (36.3) | 511 (37.1) | 512 (35.6) | 624 (35.9) | 761 (37.4) | 816 (34.4) | 939 (37.5) |
| Diabetes mellitus | 3693 (32.2) | 382 (27.7) | 443 (30.8) | 592 (34.1) | 679 (33.3) | 785 (33.1) | 812 (32.4) |
| Hypertension | 6188 (53.9) | 653 (47.4) | 739 (51.3) | 961 (55.4) | 1118 (54.9) | 1314 (55.4) | 1403 (56.0) |
| Cause of arrest (%) | |||||||
| Nontrauma | 11 073 (96.6) | 1330 (96.6) | 1403 (97.4) | 1681 (96.8) | 1979 (97.2) | 2275 (95.9) | 2405 (96.1) |
| Presumed cardiac | 7848 (68.5) | 1064 (77.3) | 1003 (69.7) | 1166 (67.2) | 1386 (68.0) | 1552 (65.4) | 1677 (67.0) |
| Respiratory | 594 (5.2) | 82 (6.0) | 129 (9.0) | 93 (5.4) | 86 (4.2) | 104 (4.4) | 100 (4.0) |
| Drowning | 82 (0.7) | 11 (0.8) | 10 (0.7) | 10 (0.6) | 16 (0.8) | 14 (0.6) | 21 (0.8) |
| Electrocution | 13 (0.1) | 2 (0.1) | 2 (0.1) | 3 (0.2) | 2 (0.1) | 1 (0.0) | 3 (0.1) |
| Other | 2536 (22.1) | 171 (12.4) | 259 (18.0) | 409 (23.6) | 489 (24.0) | 604 (25.5) | 604 (24.1) |
| Trauma | 391 (3.4) | 47 (3.4) | 37 (2.6) | 55 (3.2) | 58 (2.8) | 97 (4.1) | 97 (3.9) |
| Missing | 1 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (0.0) |
IQR indicates interquartile range.