Effects of butorphanol combined with ropivacaine on plasma adrenocorticotropic hormone and cortisol levels and postpartum depression in labor analgesia

Table 2 Visual Analog Scale scores

VAS score clinical manifestations
Level 0-3 is classified as mild pain, and patients are more likely to experience it. Acceptance, able to sleep	0	Analgesia
	1	Painless when lying flat, pain on the side
	2	Deep breathing is painless, coughing is painful
Pain of 4 to 6 is classified as moderate pain, and patients sleep, dyssomnia	3	I feel pain when I take a deep breath and cough
	4	Slight pain when lying flat
	5	Pain is persistent when lying flat
Pain on a scale of 7 to 10 is classified as severe and patients are unable to sleep	6	The pain gets worse when lying down
	7	More severe pain
	8	Pain is persistent, unbearable and severe
	9	Unbearable pain
	10	The pain was unbearable