Table 2

Ten most common peripheral nerve blocks by age category

Block		Age category
Block		1–6 months	6–12 months	1–3 years	3–6 years	6–12 years	12–18 years
Femoral	n			164	301	1764	6571
	Mean (SD)			1.11 (0.58)	0.99 (0.51)	0.97 (0.52)	0.86 (0.49)
	Median			0.97	0.92	0.87	0.76
	IDR			1.53	1.23	1.26	1.14
IL/IH	n	144	97	388	964	1584	674
	Mean (SD)	0.89 (0.62)	1.09 (0.65)	1.0 (0.61)	0.89 (0.46)	0.7’ (0.38)	0.57 (0.32)
	Median	0.83	0.97	0.9	0.83	0.65	0.51
	IDR	1.19	1.74	1.53	1.1	0.87	0.73
Interscalene	n					86	842
	Mean (SD)					0.88 (0.51)	0.86 (0.5)
	Median					0.76	0.78
	IDR					1.11	1.16
Penile	n	688	250	549	426	537	210
	Mean (SD)	1.19 (0.52)	1.23 (0.49)	1.2 (0.57)	1.01 (0.52)	0.74 (0.46)	0.68 (0.38)
	Median	1.13	1.19	1.07	0.96	0.63	0.66
	IDR	1.27	1.31	1.52	1.45	1.2	0.95
Popliteal	n			67	206	728	1789
	Mean (SD)			1.17 (0.49)	1.14 (0.55)	0.98 (0.52)	0.87 (0.53)
	Median			1.08	1.06	0.87	0.75
	IDR			1.28	1.21	1.17	1.23
Rectus sheath	n	132	60	288	746	624	425
	Mean (SD)	1.06 (0.49)	1.05 (0.50)	1.05 (0.59)	1.04 (0.59)	0.96 (0.57)	0.7 (0.44)
	Median	1.05	0.98	0.91	0.91	0.87	0.63
	IDR	1.03	0.92	1.39	1.49	1.35	0.97
Saphenous	n				140	597	1592
	Mean (SD)				0.57 (0.27)	0.56 (0.34)	0.62 (0.49)
	Median				0.54	0.48	0.47
	IDR				0.67	0.77	1.06
Sciatic	n			50	169	757	2234
	Mean (SD)			1.21 (0.58)	1.1 (0.56)	0.93 (0.42)	0.79 (0.37)
	Median			1.15	0.94	0.87	0.75
	IDR			1.02	1.36	1.02	0.84
Supraclavicular	n			250	495	807	1128
	Mean (SD)			1.05 (0.54)	0.88 (0.44)	0.83 (0.43)	0.81 (0.46)
	Median			0.97	0.77	0.73	0.83
	IDR			1.28	0.99	1.06	1.1
TAP	n	329	131	379	626	1743	1623
	Mean (SD)	0.94 (0.50)	0.91 (0.52)	0.96 (0.53)	0.9 (0.53)	0.8 (0.47)	0.68 (0.39)
	Median	0.79	0.8	0.83	0.74	0.68	0.58
	IDR	1.06	1.15	1.23	1.28	1.06	0.91

Number of blocks (n), mean and median BE dose in mg/kg and variation (IDR). IDR are the mid-80 percentiles calculated as 90th–10th percentile containing 80% of data points as a measure of variation.
BE, bupivacaine equivalents in mg; IDR, interdecile range; IL/IH, ilioinguinal/iliohypogastric; TAP, transverse abdominis plane.