# Table 2 Univariable analyses of putative risk factors for Salmonella infections in children aged ≤ 10 years, assessed in a population-based case- control study, Michigan. 2007.

Variables Cases
n = 123
Controls
n = 139
(95% CI**)
No. (%) No. (%)
Household related variables
Number of people in household
≤ 4 82 (66.67) 77 (55.40) Reference
> 4 41 (33.33) 62 (44.60) 1.56 (0.94-2.59)
Number of children aged ≤10 years
1 40 (35.52) 58 (41.73) Reference
2-3 73 (59.35) 72 (51.80) 1.47 (0.87-2.46)
≥ 3 10 (8.13) 9 (6.47) 1.53 (0.57-4.01)
Number of bedrooms
> 3 36 (29.27) 67 (48.20) Reference
2-3 70 (56.91) 46 (33.09) 2.75 (1.59-4.78)
≤ 2 17 (13.82) 26 (18.71) 1.19 (0.57-2.47)
Family room flooring
Wood 17 (13.82) 12 (8.63) Reference
Carpet 88 (71.54) 117 (84.17) 0.52 (0.24-1.14)
Other and combination 18 (14.63) 10 (7.19) 1.26 (0.43-3.61)
Attend a daycare
No 106 (86.18) 130 (93.53) Reference
Yes 17 (13.82) 9 (6.47) 2.28 (0.98-5.32)
Child attends school other than daycare
No 69 (56.10) 72 (51.81) Reference
Yes 54 (43.92) 67 (48.20) 0.96 (0.49-1.90)
Food related exposures
Ate eggs/egg containing product
No 44 (40.74) 60 (44.44) Reference
Yes 64 (59.26) 75 (55.56) 1.14 (0.65-1.98)
Ate poultry
No 13 (11.30) 17 (12.50) Reference
Yes 78 (67.83) 95 (69.85) 1.07 (0.49-2.34)
Ate poultry at:
Home 15 (41.67) 78 (56.52) Reference
Outside home at a restaurant 3 (8.33) 3 (2.17) 0.94 (0.35-2.55)
Both home and outside home 4 (11.11) 10 (7.25) 3.37 (0.86-13.21)
Ate meat
No 36 (30.51) 51 (37.78) Reference
Yes 58 (49.15) 60 (44.44) 1.31 (0.78-2.40)
Ate meat at:
Home 9 (25.00) 46 (33.33) Reference
Outside home at a restaurant 2 (5.56) 6 (4.35) 1.05 (0.31-3.53)
Both home and outside home 4 (11.11) 4 (2.90) 1.36 (0.32-5.20)
Univariable analysis Cases Controls Un-adjusted MOR*
(95% CI**)
n = 123 (%) n = 139 (%)
Drinking water source
Bottled 25 (20.33) 38 27.34 Reference
Municipal tap 73 (59.35) 81 (58.27) 1.01 (0.62-1.71)
Private well water 25 (20.33) 20 (14.39) 1.542 (0.70-2.89)
Family Kitchen practices
Keeps eggs refrigerated
Always 118 (95.93) 136 (97.84) Reference
Never or sometimes 5 (4.07) 3 (2.16) 1.92 (0.45-8.22)
Clean kitchen counters with
Soap and disinfectant 45 (36.89) 70 (50.36) Reference
Soap and water only 26 (21.31) 25 (17.99) 1.56 (0.84-3.03)
Disinfectant only 51 (41.80) 44 (31.65) 1.75 (1.01-3.04)
How often clean kitchen counter
Daily 109 (90.08) 130 (93.53) Reference
More than once a week/once a
Week/less than once a week 12 (9.92) 9 (6.47) 1.51 (0.61-3.73)
Other environmental exposure
Handled packages of raw meat/eggs while shopping with child
Did not go to shopping with child 64 (52.03) 87 (62.59) Reference
Handled packages with plastic/gloves 15 (12.20) 16 (11.51) 1.26 (0.54-2.76)
Handled packages without plastic/gloves 44 (35.77) 36 (25.90) 1.62 (0.94-2.90)
Contact with a person having GI upset
No 96 (78.05) 123 (88.49) Reference
Yes 27 (21.95) 16 (11.51) 2.15 (1.10-4.21)
Contact with animal
No contact with any animal 42 (34.15) 81 (58.27) Reference
Any animal contact 81 (65.85) 58 (41.73) 2.63 (1.59-4.34)
Dogs 53 (43.09) 47 (33.81) 1.45 (0.88-2.39)
Cats 35 (28.46) 21 (15.11) 2.23 (1.22-4.11)
Reptiles 17 (13.82) 5 (3.60) 4.16 (1.49-11.62)
Birds 4 (3.25) 1 (0.72) 4.57 (0.50-41.33)
Hamster 1 (0.81) 2 (1.44) 0.68 (0.06-7.70)
Travel history
No 90 (73.17) 106 (76.26) Reference
Yes 31 (25.20) 33 (23.74) 1.08 (0.61-1.91)
1. *Matched Odds ratio calculated using conditional logistic regression, ** Confidence interval. All exposure data were gathered for during the 3 days of child's illness onset for cases and 3 days before the interview for controls.