. 2018 Feb 27;18(1):47–56. doi: 10.17245/jdapm.2018.18.1.47

Table 2. Demographic information (categorical variables).

Variable	Midazolam first	Fentanyl first	χ² test	Logistic regression^† controlling for propensity scores
Sex	15 M, 25 F	14 M, 22 F	χ² (1, n =76) = .02; P = 0.9	β = −0.00; P = 1.00
Smoking status	27 Non-smokers	32 Non-smokers	χ² (1, n = 76) = 4.99; P = 0.03^*	β = −0.10; P = 0.91
Smoking status	13 smokers	3 smokers	χ² (1, n = 76) = 4.99; P = 0.03^*	β = −0.10; P = 0.91
ASA status	24 Class I	31 Class I	χ² (1, n = 76) = 6.46; P = 0.01^*	β = 0.08; P = 0.93
ASA status	16 Class II	5 Class II	χ² (1, n = 76) = 6.46; P = 0.01^*	β = 0.08; P = 0.93

^*Statistically significant at P < 0.05.

^†First listed variable coded 0, second coded 1. ASA, American Society of Anesthesiologists.