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Table 1 Patient characteristics overall and stratified by age. Continuous variables are reported as medians and interquartile ranges and categorical variables are reported as counts and percentages. Standardized mean differences (SMD) were used to identify distributional imbalances between age groups with an SMD of >0.1 considered to be potentially meaningful

From: Investigating use of diagnostic codes for post-COVID- 19 condition in Ontario health administrative data

 

Age

 

Variables

Overall

0–18

19–30

31–40

41–65

> 65

SMD

N

7343

249

477

714

2641

3262

 

Sex (Female) (%)

4427 (60.3)

124 (49.8)

307 (74.4)

484 (77.8)

1747 (66.1)

1765 (54.1)

0.193

Age (Median [IQR])

62.00 [45, 77]

12.00 [3, 16]

26 [23, 29]

36 [33, 38]

54 [48, 60]

79 [73, 86]

 

Immigrant (%)

918 (12.5)

0–6 (0.0–5.0)

41 (8.6)

115 (16.1)

497 (18.8)

263 (8.1)

0.276

Geographic Location (%)

      

0.139

 Central (Urban)

2699 (36.8)

84 (33.7)

197 (41.3)

295 (41.3)

1037 (39.3)

1086 (33.3)

 

 North (Remote Rural)

581 (7.9)

20 (8.0)

35 (7.3)

55 (7.7)

184 (7.0)

287 (8.8)

 

 South (Rural Urban)

2007 (27.3)

86 (34.5)

126 (26.4)

180 (25.2)

700 (26.5)

915 (28.1)

 

 West (Rural Urban)

2056 (28.0)

59 (23.7)

119 (24.9)

184 (25.8)

720 (27.3)

974 (29.9)

 

Income Quintile and Rurality (%)

      

0.222

 1 (Lowest)

1227 (16.7)

23 (9.2)

85 (17.8)

127 (17.8)

381 (14.4)

611 (18.7)

 

 2

1310 (17.8)

36 (14.5)

98 (20.5)

133 (18.6)

451 (17.1)

592 (18.1)

 

 3

1273 (17.3)

53 (21.3)

101 (21.2)

138 (19.3)

460 (17.4)

521 (16.0)

 

 4

1332 (18.1)

49 (19.7)

79 (16.6)

136 (19.0)

523 (19.8)

545 (16.7)

 

 5 (Highest)

1427 (19.4)

55 (22.1)

76 (15.9)

117 (16.4)

563 (21.3)

616 (18.9)

 

 Rural (Yes) (%)

758 (10.3)

33 (13.3)

37 (7.8)

61 (8.5)

258 (9.8)

369 (11.3)

 

 Missing

16 (0.2)

0 (0.0)

1 (0.2)

2 (0.3)

5 (0.2)

8 (0.2)

 

Comorbidities (%)

       

 Hypertension

3441 (46.9)

0–6 (0.0–5.0)

11 (2.3)

53 (7.4)

832 (31.5)

2545 (78.0)

1.149

 Diabetes

1623 (22.1)

0–6 (0.0–5.0)

7 (1.5)

29 (4.1)

417 (15.8)

1170 (35.9)

0.554

 COPD

1396 (19.0)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

363 (13.7)

1031 (31.6)

0.513

 Asthma

1705 (23.2)

50 (20.1)

126 (26.4)

196 (27.5)

656 (24.8)

677 (20.8)

0.096

 Congestive Heart Failure

725 (9.9)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

75 (2.8)

649 (19.9)

0.348

Positive COVID- 19 PCR Test Pre PCC (%)

2 [0, 4]

1 [0, 2]

1 [0, 3]

2 [0, 4]

2 [0, 4]

2 [1, 4]

0.207

Vaccination Pre PCC Diagnosis (Median [IQR])

3 [3, 5]

2 [0, 2]

3 [2, 3]

3 [2, 4]

3 [2, 4]

4 [3, 5]

0.859

Total PCC Codes (Median [IQR])

1 [1, 1]

1 [1, 1]

1 [1, 1]

1 [1, 1]

1 [1, 1]

1 [1, 2]

0.182

Post PCC Code, days (Median [IQR])

221 [110, 318]

265 [141, 336]

252 [138, 333]

246 [134, 335]

258 [134, 329]

151 [89, 295]

0.207

Pre PCC Code, days (Median [IQR])

1162 [1077, 1279]

1132 [1063, 1258]

1148 [1067, 1262]

1153 [1065, 1265.75]

1140 [1070, 1265]

1206 [1089, 1293]

0.132

Pre Pandemic, days (Median [IQR])

1186 [1186, 1186]

1186 [1186, 1186]

1186 [1186, 1186]

1186 [1186, 1186]

1186 [1186, 1186]

1186 [1186, 1186]

< 0.01

Ontario Marginalization Index (%)

 House and Dwellings

      

0.281

  1 (Lowest Marginalization)

1289 (17.6)

52 (20.9)

85 (17.8)

116 (16.2)

546 (20.7)

490 (15.0)

 

  2

1327 (18.1)

59 (23.7)

85 (17.8)

138 (19.3)

504 (19.1)

541 (16.6)

 

  3

1331 (18.1)

66 (26.5)

76 (15.9)

124 (17.4)

485 (18.4)

580 (17.8)

 

  4

1423 (19.4)

42 (16.9)

88 (18.4)

114 (16.0)

514 (19.5)

665 (20.4)

 

  5 (Highest Marginalization)

1923 (26.2)

28 (11.2)

140 (29.4)

219 (30.7)

573 (21.7)

963 (29.5)

 

 Material Resources

      

0.118

  1 (Lowest Marginalization)

1624 (22.1)

63 (25.3)

112 (23.5)

168 (23.5)

595 (22.5)

686 (21.0)

 

  2

1658 (22.6)

56 (22.5)

104 (21.8)

164 (23.0)

633 (24.0)

701 (21.5)

 

  3

1484 (20.2)

59 (23.7)

90 (18.9)

134 (18.8)

547 (20.7)

654 (20.0)

 

  4

1236 (16.8)

33 (13.3)

82 (17.2)

115 (16.1)

437 (16.5)

569 (17.4)

 

  5 (Highest Marginalization)

1291 (17.6)

36 (14.5)

86 (18.0)

130 (18.2)

410 (15.5)

629 (19.3)

 

 Age and Labour Force

      

0.345

  1 (Lowest Marginalization)

1555 (21.2)

76 (30.5)

157 (32.9)

227 (31.8)

682 (25.8)

413 (12.7)

 

  2

1316 (17.9)

48 (19.3)

103 (21.6)

152 (21.3)

534 (20.2)

479 (14.7)

 

  3

1257 (17.1)

45 (18.1)

79 (16.6)

123 (17.2)

493 (18.7)

517 (15.8)

 

  4

1277 (17.4)

33 (13.3)

68 (14.3)

123 (17.2)

436 (16.5)

617 (18.9)

 

  5 (Highest Marginalization)

1888 (25.7)

45 (18.1)

67 (14.0)

86 (12.0)

477 (18.1)

1213 (37.2)

 

 Racialized and Newcomer Populations

      

0.168

  1 (Lowest Marginalization)

1160 (15.8)

33 (13.3)

62 (13.0)

93 (13.0)

373 (14.1)

599 (18.4)

 

  2

1468 (20.0)

45 (18.1)

75 (15.7)

131 (18.3)

503 (19.0)

714 (21.9)

 

  3

1502 (20.5)

45 (18.1)

88 (18.4)

134 (18.8)

556 (21.1)

679 (20.8)

 

  4

1587 (21.6)

60 (24.1)

106 (22.2)

176 (24.6)

572 (21.7)

673 (20.6)

 

  5 (Highest Marginalization)

1576 (21.5)

64 (25.7)

143 (30.0)

177 (24.8)

618 (23.4)

574 (17.6)

 

 Missing

50 (0.7)

2 (0.7)

3 (0.6)

3 (0.4)

19 (0.7)

23 (0.7)

 

Death (%)

488 (6.6)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

0–6 (0.0–5.0)

34 (1.3)

452 (13.9)

0.317

  1. *Continuous Variable; IQR interquartile range, SMD Standardized Mean Difference, ED Emergency Department, SDS Same Day Surgery, CIHI Canadian Institute for Health Information, COPD Chronic Obstructive Pulmonary Disease, PCR Polymerase Chain Reaction, PCC Post-COVID- 19 Condition, SD standard deviation, IQU interquartile range