Table 1

Demographics and preoperative data

Femoral Block ± PCA

PCA only

N1

Mean ± SD or N (%)

N2

Mean ± SD or N (%)

P*


Age

31

72.8 ± 5.8

54

74.5 ± 6.5

0.23

Gender

31

54

0.95

Female

18 (58%)

31 (57%)

Male

13 (42%)

23 (43%)

Race

31

54

0.84

White

23 (74%)

39 (72%)

Non-white

8 (26%)

15 (28%)

Education

30

52

0.17

Less than college

12 (40%)

29 (56%)

College or above

18 (60%)

23 (44%)

History of CNS disorders

31

18 (58%)

52

35 (67%)

0.40

Daily Alcohol

31

53

0.57

< 2 drinks

24 (77%)

38 (72%)

≥ 2 drinks

7 (23%)

15 (28%)

TICS Scores

28

33.1 ± 5.8

47

31.0 ± 3.8

0.09

(mean ± SD)

GDS

30

3.1 ± 3.0

48

3.2 ± 2.7

0.93

(mean ± SD)

ASA

31

54

0.01

1 and 2

8 (26%)

29 (54%)

≥ 3

23 (74%)

25 (46%)

Use of preoperative opioids

30

15 (50%)

53

17 (32%)

0.11

Use of preoperative benzodiazepine

30

5 (17%)

53

8 (15%)

0.85

Preoperative pain level

31

3.7 ± 3.2

52

2.5 ± 2.7

0.07


ASA = American Society of Anesthesiologists. CNS = central nervous system. GDS = geriatric depression scale. SD = standard deviation. TICS = Telephone Interview for Cognitive Status

For a continuous variable, the numbers in parenthesis are the range of the variable

*For P-value, i) one-way ANOVA was used for the continuous variables; ii) Chi-square test was used for the categorical variables. If the cell count was less than 5, Fisher's exact test was used; and iii) Mantel-Haenszel chi-square test was used for the ordinal variables

Kinjo et al. BMC Anesthesiology 2012 12:4   doi:10.1186/1471-2253-12-4

Open Data