Table 4.

Total cost analysis by age (1000 KRW, 0.89 USD)

	TRD	Non-TRD	P-value	TRD/non-TRD ratio
PTD patients aged 18–39 (N)	8294	164,113
Total cost, won (mean, SD)	4186.4 ± 8013.9	621.9 ± 2707.2	< 0.0001	6.71
With depression code	2789.7 ± 5915.4	436.2 ± 2095.6	< 0.0001	6.40
With hospitalization (N, %)	2961 (35.70%)	18,530 (11.29%)
With hospitalization (mean, SD)	5233.5 ± 10,970.8	2750.6 ± 6448.0	< 0.0001	1.90
PTD patients aged 40–59 (N)	15,157	330,818
Total cost, won (mean, SD)	7010.9 ± 12,061.7	1151.0 ± 4621.8	< 0.0001	6.09
With depression code	3895.1 ± 838.9	677.4 ± 3157.4	< 0.0001	5.75
With hospitalization (N, %)	7545 (49.78%)	58,474 (17.68%)
With hospitalization (mean, SD)	7690.2 ± 13,547.7	3895.6 ± 8070.3	< 0.0001	1.97
PTD patients aged 60+ (N)	11,361	304,951
Total cost, won (mean, SD)	7846.0 ± 11,505.0	1755.9 ± 5293.5	< 0.0001	4.47
With depression code	3373.8 ± 776.5	860.4 ± 3363.1	< 0.0001	3.92
With hospitalization (N, %)	6740 (59.33%)	72,897 (23.90%)
With hospitalization (mean, SD)	6947.3 ± 11,923.1	4511.0 ± 7556.0	< 0.0001	1.54

TRD treatment-resistant depression, SD standard deviation