# Table 3

Factors affecting amount spent in purchasing western and Chinese OTC products

Western OTC products

Chinese OTC products

Univariate analysis (Chi-square)

Multivariate Analysis (Logistic Regression)

Univariate analysis (Chi-square)

Multivariate Analysis (Logistic Regression)

≤ \$100

n (%)

\$101 or above

n (%)

X2

P

\$101 or above

OR (95% CI)

P

≤ \$100

n (%)

\$101 or above

n (%)

X2

P

\$101 or above

OR (95% CI)

P

Age (yrs)

18-29

34 (22.5)

5 (13.9)

1.61

0.446

5 (14.3)

4 (10.3)

0.28

0.868

30-59

99 (65.6)

25 (69.4)

23 (65.7)

27 (69.2)

60 or above

18 (11.9)

6 (16.7)

7 (20.0)

8 (20.5)

Gender

Male

74 (49.3)

12 (33.3)

2.99

0.096

0.54 (0.25-1.19)

0.126

18 (50.0)

12 (30.8)

0.29

0.104

0.50 (0.19-1.31)

0.157

Female

76 (50.7)

24 (66.7)

reference

18 (50.0)

27 (69.2)

reference

Education

No schooling/primary

14 (9.3)

3 (8.3)

0.11

0.949

5 (14.3)

8 (21.1)

0.86

0.651

Secondary

79 (52.7)

20 (55.6)

18 (51.4)

20 (52.6)

Diploma/degree

57 (38.0)

13 (36.1)

12 (34.3)

10 (26.3)

Monthly household income (HK\$)#

< \$2000-\$5999

7 (5.4)

2 (8.0)

3.05

0.384

1 (3.8)

4 (14.8)

2.16

0.339

\$6000-\$9999

12 (9.2)

0

0

0

\$10000-\$24999

56 (43.1)

10 (40.0)

15 (57.7)

12 (44.4)

≥\$25000

55 (42.3)

13 (52.0)

10 (38.5)

11 (40.7)

Presence of chronic illness

Yes

22(14.6)

14 (38.9)

11.06

0.002

3.58 (1.58-8.09)

0.002

9 (25.0)

20 (51.3)

5.45

0.032

2.94 (1.08-7.95)

0.034

No

129 (85.4)

22 (61.1)

reference

27 (75.0)

19 (48.7)

reference

#HKD1 = USD0.128

You et al. BMC Clinical Pharmacology 2011 11:19   doi:10.1186/1472-6904-11-19