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Table 3 Detailed event and patient counts

From: Patterns of seasonal and pandemic influenza-associated health care and mortality in Ontario, Canada

 

Code

Category

2006

2007

2008

2009

1

OHIPall

OHIP billing records

314,533,393

318,206,249

334,075,651

370,249,708

2

OHIPpi

∙P&I only

1,087,450

1,002,877

1,021,636

1,738,838

3

OHIPi

∙Influenza only

305,092

281,213

290,552

654,836

4

DADall

DAD/IP hospital records

1,068,648

1,068,888

1,065,756

1,070,806

5

upi

Unique EHINs with P&I in at least one OHIP record

467,746

440,606

445,195

627,733

6

ui

upi; influenza

236,433

222,971

229,131

414,415

7

upiDAD

upi; EHIN appears in a DAD/IP record

88,159

83,901

85,159

98,840

8

uiDAD

upiDAD; influenza

20,042

18,738

18,894

33,039

9

DADu

Unique EHINs in DAD/IP records

826,314

828,860

827,458

831,011

10

OHIPupiDAD

OHIP records associated with unique EHINs in upiDAD

9,932,713

9,791,074

10,289,693

13,246,852

11

OHIPupiDADpi

OHIPupiDAD; P&I

508,937

476,228

494,670

845,637

12

OHIPuiDAD

OHIP records associated with the unique EHINs in uiDAD

28,840

25,472

26,274

65,172

13

DADupiDAD

DAD/IP records associated with the unique EHIN list in upiDAD

114,146

137,229

139,459

157,247

14

DADuiDAD

DAD/IP records associated with the unique EHINs in uiDAD

27,849

25,886

25,819

44,514

15

DADd

deaths in DAD/IP records

40,396

40,567

41,761

41,142

16

DADdpi

∙P&I deaths within the year

11,241

11,239

11,715

11,516

17

DADdpi1

∙P&I deaths during first admission

7,117

7,190

7,495

7,396

18

DADdi

∙Influenza deaths within the year

600

587

642

928

19

DADdi1

∙Influenza deaths during first admission

401

402

422

620

  1. Abbreviations: P&I = “pneumonia or influenza” (i.e., ICD-9 codes 486 or 487; see Table 1), OHIP = “Ontario Health Insurance Plan”, DAD/IP = “Discharge Abstract Database inpatient”, EHIN = “Encrypted Health Insurance Number”, = “subset of”