[Retracted] Analysis of the Clinical Effect of Music Combined with Hypnosis on Labor Analgesia Based on Data Mining

Table 3

Comparison of duration of labor between the two groups.

Group	The first labor (min)			The second labor (min)
	120–180	180–240	>240	<60	60–120	>120
The treatment group	43	5	2	46	4	0
The control group	24	25	1	9	39	2
χ2		55			84
value		<0.01			<0.01