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. 2019 Apr;149(4):548–553. doi: 10.4103/ijmr.IJMR_916_18

Table.

Demographic characteristics of primary and secondary dengue cases (n=1372)

Characteristics Confirmed dengue (n=1372) Primary dengue (n=897), n (%) Secondary dengue (n=475), n (%)
Age (yr)
Median (IQR) 24 (16-34) 25 (17-35) 23 (13.5-34)
Age groups
≤5 70 43 (61) 27 (39)
06-10 123 60 (49) 63 (51)
11-15 137 90 (66) 47 (34)
16-20 185 121 (65) 64 (35)
21-25 240 162 (68) 78 (33)
26-30 183 131 (72) 52 (28)
31-35 117 83 (71) 34 (29)
36-40 101 69 (68) 32 (32)
41-45 62 36 (58) 26 (42)
46-50 51 31 (61) 20 (39)
51-55 32 23 (72) 9 (28)
56-60 34 24 (71) 10 (29)
61-65 21 12 (57) 9 (43)
66-70 10 8 (80) 2 (20)
71-75 6 4 (67) 2 (33)
Sex
Male 855 (62) 554 (62) 301 (63)
Female 517 (38) 343 (38) 174 (37)
Place
Amritsar 85 52 (61) 33 (39)
Bangaluru 124 64 (52) 60 (48)
Bhopal 91 72 (79) 19 (21)
Bhubaneswar 9 9 (100) 0 (0)
Chandigarh 80 68 (85) 12 (15)
Dibrugarh 47 39 (83) 8 (17)
Jabalpur 100 68 (68) 32 (32)
Jaipur 98 61 (62) 37 (38)
Kolkata 81 71 (88) 10 (12)
Lucknow 91 73 (80) 18 (20)
New Delhi 134 113 (84) 21 (16)
Port Blair 49 40 (82) 9 (18)
Srinagar 77 69 (90) 8 (10)
Theni 100 27 (27) 73 (73)
Tirupati 99 33 (33) 66 (67)
Udupi, Manipal 107 38 (36) 69 (64)

IQR, interquartile range