Item reduction and validation of the Chinese version of diabetes quality-of-life measure (DQOL)

Table 1 Patients’ baseline demographic and diabetes-related information

	Study sample (N = 2886)	Validation sample (N = 2286^a)	P-value^b
Age mean (SD), years	61.15 (11.42)	61.84 (11.25)	0.030
Female	1607 (55.68)	1269 (55.51)	0.910
Diabetes duration mean (SD), years	7.94 (6.75)	7.69 (6.33)	0.174
Retired	1850 (64.10)	1544 (67.54)	0.010
Used insulin in the last 6 months	467 (16.18)	476 (20.82)	< 0.001
Controlled diet	2580 (89.40)	2036 (89.06)	0.718
EQ-5D-3 L index mean (SD)	0.89 (0.14)	0.89 (0.13)	0.999
EQ-ED VAS mean (SD)	72.71 (15.46)	73.00 (15.48)	0.503
DQOL score mean (SD)^c	2.07 (0.38)	2.07 (0.39)	0.999

The values presented are numbers (percentage) unless otherwise stated
^aA total of 2542 patients finished the last round follow-up at the year end. Only observations with no missing data on the EQ-5D-3L and DQOL questions were included in the validation sample
^bT-test for mean and Chi-square test for frequency
^cThe DQOL score was calculated from the mean of the 46 items
SD Standard deviation; VAS Visual analogue scale; DQOL Diabetes quality-of-life measure

ISSN: 1477-7525