Table 1.
Characteristics and smoking statuses of the patient groups studied based on the two-year follow-up
| All N 35650 |
Asthma N 4 549 |
COPDa N 2 111 |
Sleep apnoea N 5 931 |
Type 1 diabetes N 632 |
Type 2 diabetes N 8 281 |
IHD2 N 9 200 |
Cerebral infarction N 4 946 |
|
|---|---|---|---|---|---|---|---|---|
| Men | 18,997 (53.3) | 1 455 (32.0) | 1 397 (66.2) | 3 945 (66.5) | 335 (53.0) | 4 267 (51.5) | 5 246 (57.0) | 2 352 (47.6) |
| Women | 16,653 (46.7) | 3 094 (68.0) | 714 (33.8) | 1 986 (33.5) | 297 (47.0) | 4 014 (48.5) | 3 954 (43.0) | 2 594(52.4) |
| Mean age (SD) | 63.5 (16.4) | 50.7 (19.0) | 66.3 (10.8) | 53.5 (12.7) | 40.6 (18.3) | 65.9 (13.4) | 71.2 (13.0) | 70.8 (14.2) |
| N of patients with at least one documented smoking status in EHR 3 | 21,372 (59.9) | 2775(61.0) | 1820(86.1) | 4 949(83.4) | 331 (52.4) | 3 634 (43.9) | 5 005(54.4) | 2858(57.8) |
| Smoking status4 | ||||||||
| Current smoker | 7 105/21,372 (33.2) | 813/2775 (29.3) | 1 268/1820 (69.7) | 1 243/4 949(25.1) | 118/331 (35.6) | 1135/3 634(31.2) | 1 586/5 005 (31.7) | 942/2 585(33.0) |
| Ex-smoker | 4 852/21,372 (22.7) | 599/2775 (21.6) | 501/1820 (27.5) | 1 384/4 949 (28.0) |
38/331(11.5) | 820/3 634 (22.6) | 1 114/5 005 (22.3) | 396/2 585 (13.9) |
| Never smoker | 9 415/21,372 (44.1) | 1363/2775 (49.1) | 51/1820(2.8) | 2 322/4 949(46.9) | 175/331 (52.9) | 1 679/3 634 (46.2) | 2 305/5 005 (46.1) | 1520/2 585 (53.2) |
| N of texts per patient including smoking status, mean (SD)5 | 2.0(3.2) | 1.7(2.7) | 5.3 (5.8) | 1.8(2.3) | 1.5(3.3) | 1.3(2.7) | 1.8 (2.9) | 2.4(3.6) |
| N of events per patient during the follow-up, median (IQR)5 | 18(9–34) | 14(6–28) | 22(10–43) | 12[7–22] | 18(8–31) | 17(8–35) | 19(11–34) | 28(17–45) |
Data is presented as n (%) unless otherwise stated. SD = Standard Deviation. N = Number. IQR = Inter quartile range.
aChronic obstructive pulmonary diseases 2Ischemic heart diseases 3Electronic health records 4 percentages have been calculated from the patients whose EHR contains at least one smoking related sentence. 5One event/text = one visit