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Table 3 Patient characteristics and outcomes

From: Validation of an algorithm based on administrative data to detect new onset of atrial fibrillation after cardiac surgery

Patient characteristics

UHC A (n = 479)

UHC B (n = 497)

Total (n = 976)

Age in years – M (SD)

68.4 (9.2)

68.6 (10.7)

68.5 (10.0)

Male sex – n (%)

363 (75.8)

328 (66.0)

691 (70.8)

Charlson score – M (SD)

0.76 (1.21)

1.70 (1.65)

1.24 (1.52)

HES score – M (SD)

4.6 (6.4)

4.6 (7.2)

4.6 (6.8)

Admission type – n (%)

 Elective

256 (53.4)

69 (13.9)

325 (33.3)

 Semi-urgent

35 (7.3)

314 (63.2)

349 (35.8)

 Urgent

188 (39.3)

114 (22.9)

302 (30.9)

Surgery type – n (%)

 CABG

201 (42.0)

256 (51.5)

457 (46.8)

 Valvular

149 (31.1)

143 (28.8)

292 (29.9)

 Mixed CABG-valvular

129 (27.0)

98 (19.7)

227 (23.3)

Maze procedure – n (%)

15 (3.1)

16 (3.2)

31 (3.2)

POAF – n (%)

 CABG

59 (29.4)

81 (31.6)

140 (30.6)

 Valvular

52 (34.9)

37 (25.9)

89 (30.5)

 Mixed CABG-valvular

63 (48.8)

32 (32.7)

95 (41.9)

 Total

174 (36.3)

150 (30.2)

324 (33.2)

In-hospital death – n (%)

22 (4.6)

26 (5.23)

48 (4.9)

Length of hospital stay in days - Md (Range)

12 (3–127)

9 (2–217)

11 (2–217)

Number of hospitalizations in the previous 12 months - Md (Range)

0 (0–4)

0 (0–4)

0 (0–4)

Number of ER visits in the previous 12 months - Md (Range)

0 (0–20)

0 (0–4)

0 (0–20)

  1. Abbreviations: AF: Atrial fibrillation, CABG Coronary artery bypass graft, ER Emergency room, HES Hospital Episode Statistic score, M Means, Md Median, SD Standard deviation