Correlation between self-management, psychological cognitive impairment, and quality of life in elderly chronic obstructive pulmonary disease patients

Table 5 Comparison of total scores of qualities of elderly chronic obstructive pulmonary disease patients with different demographic characteristics (n = 312)

Variable	Total score of quality of life, median (P25, P75)	Z/H value	P value
Age, years
60-69	23.00 (18.00, 28.00)	4.456	0.108
70-79	22.00 (18.00, 27.00)
80 and above	25.00 (20.75, 29.00)
Body mass index, kg/m2
< 18.5	24.00 (19.00, 29.00)	2.077	0.354
18.5-23.9	24.00 (18.00, 28.00)
≥ 24	22.00 (18.00, 27.00)
Gender
Male	24.00 (19.00, 28.00)	0.720	0.472
Female	22.50 (18.00, 28.75)
Degree of education
Elementary school and below	25.00 (19.00, 29.00)	7.370	0.025
Junior high school and vocational school, high school, and vocational college	22.00 (18.00, 27.00)
College degree, undergraduate degree or above	20.00 (16.25, 24.50)
Living
To live alone	22.00 (19.00, 27.00)	0.314	0.754
Not living alone	24.00 (18.00, 28.00)
Per capita household income, yuan
< 2842.5	24.00 (20.25, 28.00)	0.960	0.337
≥ 2842.5	24.00 (18.00, 28.00)
Smoking situation
Never smoking situation	22.00 (17.75, 26.25)	5.699	0.058
Swear off smoking	25.00 (19.00, 28.50)
Smoking situation	21.00 (18.00, 27.50)
Engage in intellectual activities every day
Correct	20.50 (16.00, 26.25)	3.821	< 0.001
Deny	25.00 (19.75, 29.00)
Frequency of physical exercise
0 time/week	25.50 (21.00, 30.00)	30.767	< 0.001
Approximately 1 time/week	22.00 (17.00, 26.00)
≥ 3 times/week	20.00 (16.00, 25.00)
Sleep duration per night
≤ 6 hours	26.00 (22.00, 30.00)	5.667	< 0.001
> 6 hours	21.00 (16.00, 26.00)
Disease duration, years
< 5	22.00 (17.00, 26.00)	15.703	< 0.001
5-10	25.00 (19.00, 29.00)
> 10	25.00 (21.00, 30.00)
Fall history in the past year
No	23.50 (18.00, 28.00)	2.349	0.019
Yes	26.50 (22.50, 30.50)
Polypharmacy
No	24.00 (19.00, 28.00)	1.189	0.235
Yes	22.00 (18.00, 28.00)
Coexistence of multiple illnesses
No	21.00 (16.00, 26.50)	3.024	0.002
Yes	24.00 (19.00, 28.00)
Random blood glucose
Normal	23.00 (18.00, 28.00)	0.932	0.628
Above normal	24.00 (20.00, 28.00)
Below normal	24.00 (21.00, 27.50)
Pulmonary function classification, grade
I	19.00 (13.75, 24.00)	59.504	< 0.001
II	21.00 (16.00, 26.00)
III	25.00 (21.00, 29.75)
IV	27.50 (22.25, 31.00)
Dyspnea classification, level
0	19.00 (12.00, 24.25)	69.582	< 0.001
1	19.00 (14.00, 24.00)
2	21.00 (18.00, 26.00)
3	26.00 (22.00, 29.00)
4	29.00 (22.00, 33.00)
Hypoxemia
No	21.00 (17.00, 26.00)	6.696	< 0.001
Yes	26.00 (22.00, 30.00)
Persist in using inhaled medication
No	25.00 (20.00, 28.00)	3.987	< 0.001
Yes	20.00 (16.00, 27.00)
Long term oxygen therapy status
No	22.00 (18.00, 27.00)	5.18	< 0.001
Yes	28.00 (22.00, 31.00)