Table 4 Logistic regressions examining the association between reasons for individual product use and co-use with odds of lifetime engagement in (a) sequential use practices (“chasing”), and (b) co-administration behaviors (n = 112)

 User experience

0.86

0.24

3.02

0.81

1.06

0.47

2.39

0.88

 Product/substance

1.61

0.55

4.68

0.38

1.21

0.59

2.49

0.60

 Utility

1.22

0.50

3.00

0.66

0.90

0.52

1.56

0.72

 Harm reduction

1.08

0.64

1.80

0.78

1.10

0.80

1.52

0.57

 User experience

2.18*

1.01

4.71

0.05

0.87

0.44

1.73

0.69

 Product/substance

1.34

0.66

2.70

0.41

1.64

0.74

3.67

0.23

 Utility

0.44

0.18

1.05

0.07

0.89

0.55

1.44

0.65

 Harm reduction

1.18

0.66

2.11

0.58

1.17

0.78

1.74

0.45

 User experience

1.00

0.40

2.53

0.99

0.82

0.41

1.61

0.56

 Product/substance

0.33

0.08

1.32

0.12

1.01

0.47

2.16

0.98

 Utility

2.99*

1.07

8.35

0.04

1.55

0.85

2.83

0.15

 Harm reduction

0.95

0.52

1.72

0.87

1.05

0.71

1.56

0.82

 Instrumentality

3.06*

1.29

7.30

0.01

1.27

0.90

1.81

0.17

 Displacement

0.82

0.34

1.93

0.64

1.41

0.93

2.13

0.10

 Social context

0.85

0.49

1.47

0.56

1.02

0.77

1.34

0.89

 Experimentation

0.47*

0.24

0.91

0.02

1.05

0.74

1.51

0.78