Table 2 Description of age and gender using simple (unweighted) and weighted methods

Dataset 1

N = 310

N = 310

Age

  < 30 years

125 (40.2%)

171 (55.2%)

26.90

 30 – 34 years

36 (11.5%)

54 (17.4%)

33.33

 35 – 39 years

28 (9.2%)

32 (10.3%)

12.5

 40 – 44 years

23 (7.5%)

25 (8.1%)

8.00

  > 45 years

98 (31.6%)

28 (9.0%)

250

Gender

 Male

151 (48.6%)

95 (30.6%)

58.94

 Female

159 (51.4%)

215 (69.4%)

26.04

Dataset 2

N = 508

N = 509

Age

  < 30 years

204 (40.1%)

170 (33.4%)

20.00

 30 – 34 years

59 (11.5%)

45 (8.8%)

31.11

 35 – 39 years

47 (9.2%)

74 (14.5%)

36.48

 40 – 44 years

38 (7.6%)

74 (14.5%)

48.64

  > 45 years

161 (31.6%)

146 (28.7%)

10.27

Gender

 Male

248 (48.7%)

131 (25.7%)

89.31

 Female

261 (51.3%)

378 (74.3%)

30.95

Dataset 3

N = 202

N = 202

Age

  < 35 years

105 (51.8%)

30 (14.9%)

250

 35 – 39 years

19 (9.2%)

14 (6.9%)

35.71

 40 – 44 years

15 (7.5%)

31 (15.3%)

51.61

  > 45 years

64 (31.6%)

127 (62.9%)

49.60

Gender

 Male

98 (48.6%)

122 (60.4%)

19.67

 Female

104 (51.4%)

80 (39.6%)

30.0

Dataset 4

N = 2373

N = 2336

Age

  < 30 years

944 (40.3%)

1111 (47.6%)

15.03

 30 – 34 years

269 (11.5%)

264 (11.3%)

1.89

 35 – 39 years

214 (9.2%)

304 (13.0%)

29.60

 40 – 44 years

175 (7.5%)

251 (10.7%)

30.27

  > 45 years

737 (31.5%)

406 (17.4%)

81.52

Gender

 Male

1144 (48.4%)

502 (21.3%)

127.88

 Female

1218 (51.6%)

1856 (78.7%)

34.37

Dataset 5

N = 323

N = 324

Age

  < 30 years

130 (40.1%)

203 (62.7%)

35.96

 30 – 34 years

37 (11.6%)

30 (9.3%)

23.33

 35 – 39 years

30 (9.2%)

31 (9.6%)

3.22

 40 – 44 years

24 (7.5%)

31 (9.6%)

22.58

  > 45 years

102 (31.6%)

29 (9.0%)

251.72

Gender

 Male

158 (48.8%)

64 (19.8%)

146.87

 Female

165 (51.2%)

260 (80.2%)

36.53

Dataset 6

N = 405

N = 405

Age

  < 20 years

57 (14.2%)

136 (33.6%)

58.08

 20 – 24 years

56 (13.8%)

80 (19.8%)

30

 25 – 29 years

49 (12.2%)

46 (11.4%)

6.52

 30 – 34 years

47 (11.5%)

22 (5.4%)

113.63

  > 35 years

196 (48.3%)

121 (29.9%)

61.98

Gender

 Male

197 (48.7%)

82 (20.2%)

140.24

 Female

208 (51.3%)

323 (79.8%)

35.60

Dataset 7

N = 409

N = 410

Age

  < 20 years

59 (14.3%)

36 (8.8%)

63.88

 20 – 24 years

56 (13.8%)

105 (25.6%)

46.66

 25 – 29 years

50 (12.1%)

104 (25.4%)

51.92

 30 – 34 years

47 (11.6%)

63 (15.4%)

25.39

  > 35 years

197 (48.2%)

102 (24.9%)

93.13

Gender

 Male

199 (48.7%)

79 (19.3%)

151.89

 Female

210 (51.3%)

331 (80.7%)

36.55