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Table 1 Characteristics of the datasets used for development and validation of the prediction model

From: Predicting medical usage rate at mass gathering events in Belgium: development and validation of a nonlinear multivariable regression model

 

Model developmenta

Temporal validationb

External validationc

Total nr. of manifestations (nr. of different manifestations)

194 (28)

19 (19)

69 (32)

Cumulative nr. of attendees (range)

22,251,084

(10,000–1,500,000)

2,569,150

(5500–1,300,000)

2,295,448

(733–120,000)

Cumulative nr. of patients (range)

131,181 (24–7143)

17,084 (55–8229)

10,517 (13–716)

Overall PPR (range)

59.0 (3.9–626.3)

66.5 (4.4–290.9)

45.8 (2.7–411.8)

Cumulative nr. of hospital transfers (range)

2748 (0–113)

335 (0–98)

260 (0–15)

Overall TTHR (range)

1.2 (0.0–12.3)

1.3 (0.0–16.4)

1.1 (0.0–27.3)

MG category, n (%)

 City festival

37 (19)

3 (16)

10 (14)

 Indoor EDM

19 (10)

1 (5)

0 (0)

 Indoor dance

12 (6)

2 (11)

3 (4)

 Outdoor EDM

21 (11)

1 (5)

18 (26)

 Outdoor music

85 (44)

9 (47)

25 (36)

 Sports event

20 (10)

3 (16)

13 (19)

Attendance class, n (%)

  < 10,000

0 (0)

0 (0)

13 (19)

 10,000–20,000

39 (20)

4 (21)

20 (29)

 20,000–30,000

36 (19)

5 (26)

10 (14)

 30,000–100,000

67 (34)

4 (21)

21 (30)

 100,000–1,000,000

44 (23)

5 (26)

5 (7)

  > 1,000,000

8 (4)

1 (5)

0 (0)

Age class, n (%)d

 Children (< 16 y)

8 (4)

1 (5)

0 (0)

 Young adults (16–30 y)

132 (68)

12 (63)

44 (64)

 Middle adults (> 30 y)

32 (16)

3 (16)

16 (23)

 Mixed/family (broad range)

22 (11)

3 (16)

9 (13)

Timing, n (%)

 Day

28 (14)

4 (21)

16 (23)

 Night

51 (26)

5 (26)

9 (13)

 Day + night

115 (59)

10 (53)

44 (64)

Nr. of days (%)

 1

80 (41)

8 (42)

33 (48)

 2

39 (20)

2 (11)

21 (30)

 3+

75 (39)

9 (47)

15 (22)

Indoor, n (%)

31 (16)

3 (16)

3 (4)

Bounded, n (%)

158 (81)

14 (74)

56 (81)

Camping, n (%)

78 (40)

8 (42)

26 (38)

Availability of alcohol, n (%)

 None

8 (4)

1 (5)

0 (0)

 Limited

20 (10)

3 (16)

13 (19)

 Unlimited

166 (86)

15 (79)

56 (81)

  1. PPR patient presentation rate, TTHR transfer to hospital rate, MG mass gathering, EDM electronic dance music
  2. aDataset containing the 2009–2016 editions of MGs with at least five editions in the period 2009–2016 and at least 10,000 attendees (cumulative for multiday events) at each of the editions included
  3. bDataset with the 2018 editions of MGs included in the model development dataset
  4. cDataset with the 2009–2016 editions of MGs not meeting the inclusion criteria for the model development dataset
  5. dMedian values were used. For the mixed/family class, a combination of Q1 < 21 y with IQR > 20 y was applied. When Q1 < 18 y, an IQR > 15 y was deemed sufficient to fit in the mixed/family class
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BMC Public Health

ISSN: 1471-2458

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