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Table 1 Demographic characteristics of the CampySource Project case–control study for all campylobacteriosis cases, C. jejuni cases, C. coli cases, and controls, Australia, 2018–2019

From: Risk factors for campylobacteriosis in Australia: outcomes of a 2018–2019 case–control study

Characteristic All cases (n = 571) n (%) Controls (n = 586) n (%) C. jejuni cases (n = 422) n (%) C. coli cases (n = 84) n (%) P value*
Sex Female 241 (42) 244 (42) 186 (44) 30 (36) 0.196
Male 330 (58) 342 (58) 236 (56) 54 (64)  
Jurisdiction ACT 93 (16) 93 (16) 64 (15) 5 (6) 0.076
HNE 178 (31) 192 (33) 116 (28) 27 (32)  
Qld 300 (53) 301 (51) 242 (57) 52 (62)  
Age Mean (SD) 39.4 (24.0) 40.2 (23.9) 38.1 (24.1) 44.4 (21.9) 0.018
Rurality Rural or remote 81 (14) 75 (13) 66 (16) 9 (11) 0.317
Aboriginal and Torres Strait Islander status Aboriginal and Torres Strait Islander person 28 (5) 27 (5) 22 (5) 3 (4) 0.783
Season Summer 145 (25) 139 (24) 102 (24) 28 (33) 0.354
Autumn 147 (26) 120 (21) 112 (27) 18 (21)  
Winter 159 (28) 204 (35) 118 (28) 22 (26)  
Spring 120 (21) 119 (20) 90 (21) 16 (19)  
Highest level of education Year 10 66 (12) 64 (11) 46 (11) 13 (15) 0.312
Year 12 77 (14) 75 (13) 62 (15) 6 (7)  
TAFE/apprenticeship 145 (25) 151 (26) 106 (25) 19 (23)  
Undergraduate degree 160 (28) 157 (27) 122 (29) 25 (30)  
Postgraduate degree 114 (20) 134 (23) 79 (19) 19 (23)  
Unknown or refused 8 (1) 3 (< 1) 6 (1) 2 (2)  
Household income in AUD per annum < $25 k 35 (6) 39 (7) 24 (6) 7 (8) 0.874
$25–50 k 93 (17) 81 (14) 67 (16) 14 (17)  
$50–100 k 145 (25) 124 (21) 113 (27) 20 (24)  
$100–150 k 122 (21) 146 (25) 85 (20) 17 (20)  
> $150 k 118 (21) 140 (24) 87 (20) 19 (23)  
Unknown or refused 57 (10) 54 (9) 45 (11) 7 (8)  
Language in household Language other than English 52 (9) 52 (9) 36 (9) 7 (8) 1.000
  1. ACT Australian Capital Territory, HNE Hunter New England region of New South Wales, Qld Queensland, TAFE Technical and Further Education
  2. *t test, Fisher’s test, or Pearson’s Chi-squared test of the difference between C. jejuni and C. coli cases