Skip to main content

Table 2 Patient characteristics according to K86 & exclusion coding

From: Health services research in the public healthcare system in Hong Kong: An analysis of over 1 million antihypertensive prescriptions between 2004–2007 as an example of the potential and pitfalls of using routinely collected electronic patient data

Coding

K86 coded & without exclusion codes (n = 30,704)

K86 coded with exclusion codes (n = 16,155)

No K86 but with exclusion codes (n = 10,182)

No K86 & no exclusion codes (36,409)

All cases (n = 93,450)

p value*

Patient

"K86 only group"

"combined group"

"Exclusion group"

"Non-coded group"

  

Age on appt. (no.%)

      

<50

4550(14.8)

1,073 (6.6)

791 (7.8)

7,484 (20.6)

13898(14.9)

<0.001

50–59

8116(26.4)

2,814 (17.4)

1,804 (17.7)

9,704 (26.7)

22438(24.0)

 

60–69

6954(22.6)

4,191(25.9)

2,421 (23.8)

7,516 (20.6)

21082(22.6)

 

≥70

11084(36.1)

8,077 (50.0)

5,166 (50.7)

11,705 (32.1)

36032(38.6)

 

Mean Age on appt . (SD) (95% C.I.)

63.87(13.06)

68.22 (11.61)

68.45 (12.46)

61.77 (14.26)

64.30 (13.51)

<0.001

 

(63.73, 64.02)

(68.04, 68.40)

(68.21, 68.69)

(61.62, 61.91)

(64.21, 64.39)

 

Gender(No./%)

      

Male

11,323 (36.9)

7,442 (46.1)

6,153 (60.4)

15,412 (42.3)

40330 (43.2)

<0.001

Female

19,381 (63.1)

8,713 (53.9)

4,029 (39.6)

20,997 (57.7)

53120 (56.8)

 

Payment status

      

Fee-waivers

7,949 (25.9)

4,379 (27.1)

3,147 (30.9)

9,696 (26.6)

25,171 (26.9)

<0.001

Non- waivers

22,755 (74.1)

11,776 (72.9)

7,035 (69.1)

26,713 (73.4)

68,279 (73.1)

 

District of residence

      

Shatin

18,510 (60.3)

8,817 (54.6)

5,524 (54.3)

12,120 (33.3)

44,971 (48.1)

<0.001

Taipo

6,780 (22.1)

2,883 (17.8)

1,773 (17.4)

11,156 (30.6)

22,592 (24.2)

 

North

4,068 (13.2)

3,721 (23.0)

2,206 (21.7)

10,684 (29.3)

20,679 (22.1)

 

Others

1,346 (4.4)

734 (4.5)

679 (6.7)

2,449 (6.7)

5,208 (5.6)

 

Service type

      

General

28,946 (94.3)

13,881 (85.9)

7,523 (73.9)

34,524 (94.8)

84,874 (90.8)

<0.001

FMSC/IC

1,625 (5.3)

2,260 (14.0)

2,618 (25.7)

1,673 (4.6)

8,176 (8.7)

 

Staff clinic

133 (0.4)

14 (0.1)

41 (0.4)

212 (0.6)

400 (0.4)

 

Appointment type (no./%)

      

New case

14,705 (47.9)

5,485 (34.0)

4,784 (47.0)

23,831 (65.5)

48,805 (52.2)

<0.001

Old case

15,999 (52.1)

10,670 (66.0)

5,398 (53.0)

12,578 (34.5)

44,645 (47.8)

 
  1. (*: Pearson Chi Square tests)