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Table 1 Characteristics of hospitalized patients with UGIB secondary to PUD from 2004 to 2010

From: Upper gastrointestinal bleeding due to peptic ulcer disease is not associated with air pollution: a case-crossover study

Variable

Overall

Calgary

Edmonton

P-value

Patients (%)

2523

1374 (54.5)

1149 (45.5)

 

Median Age in Years (IQR)

70.0 (54.0–80.0)

68.0 (53.0–80.0)

72.0 (56.0–80.0)

0.1

Sex (%)

   

0.9

 Male

1561 (61.9)

851 (61.9)

710 (61.8)

 

 Female

962 (38.1)

523 (38.1)

439 (38.2)

 

Number of Comorbidities (%)

   

<0.001

 0

1326 (52.6)

812 (59.1)

514 (44.7)

 

 1

495 (19.6)

229 (16.7)

266 (23.2)

 

 2

289 (11.5)

138 (10.0)

151 (13.1)

 

 3

170 (6.7)

81 (5.9)

89 (7.8)

 

 4

101 (4.0)

48 (3.5)

53 (4.6)

 

 5

59 (2.3)

24 (1.8)

35 (3.1)

 

 ≥6

83 (3.3)

42 (3.1)

41 (3.6)

 

Season (%)

   

0.002

 Autumn

635 (25.2)

314 (22.9)

321 (27.9)

 

 Spring

621 (24.6)

372 (27.0)

249 (21.7)

 

 Summer

659 (26.1)

369 (26.9)

290 (25.2)

 

 Winter

608 (24.1)

319 (23.2)

289 (25.2)

 

Perforated PUD (%)

   

0.03

 No

2456 (97.3)

1346 (98.0)

1110 (96.6)

 

 Yes

67 (2.7)

28 (2.0)

39 (3.4)

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