Table 4.

Subgroup analysis based on treatment durations between the jidabokuippo and the nonsteroidal anti-inflammatory drug groups.

	Jidabokuippo group (number)	NSAIDs group (number)	P value
Gender
Male	7 days (7–77 days) (35)	14 days (7–77 days) (37)	0.3783
Female	7 days (7–42 days) (46)	17 days (5–42 days) ∗(44)	<0.0001
The number of rib fractures
Single	7 days (7–77 days) (74)	14 days (5–77 days) (74)	<0.0001
Multiple	14 days (7–23 days) (7)	13 days (7–28 days) (7)	0.4340
Site of rib fractures
Upper	7 days (7–42 days) (5)	14 days (7–28 days) (5)	0.6664
Middle	10 days (7–23 days) (34)	14 days (5–49 days) (43)	0.0020
Lower	7 days (7–77 days) (46)	14 days (7–77 days) (37)	0.0934
Accompanying injuries
(+)	7 days (7–14 days) (4)	14 days (7–28 days) (6)	0.1224
(−)	7 days (7–77 days) (77)	14 days (5–77 days) (75)	0.0006
Comorbidities
(+)	14 days (7–28 days) (19)	14 days (7–42 days) (18)	0.1130
(−)	7 days (7–77 days) (62)	14 days (5–77 days) (63)	0.0007

^∗ P < 0.05, male versus female; NSAIDs: nonsteroidal anti-inflammatory drugs.