Exhibit 3.6. Orthopedic Procedures Number and Percent Distribution of the Most Frequent Musculoskeletal All-listed Procedures within Age Groups, 2005
CCS Procedure Category and Name (All-listed Procedures) Age Group
All ages† <1 1-17 18-44 45-64 65-84 85+
Total all musculoskeletal procedures 3,399,600 7,200 198,400 596,200 1,114,000 1,225,500 251,300
142 Partial excision of bone 208,900 400 15,100 49,800 84,900 53,800 4,600
146 Treatment of fracture or dislocation of hip and femur 313,700 800 25,200 29,300 43,300 127,400 86,900
147 Treatment of fracture or dislocation of lower extremity (leg, other than hip or femur) 222,500 100 18,600 79,900 76,200 40,500 6,200
152 Arthroplasty knee (surgical reconstruction or replacement of knee) 555,800 * 2,800 18,300 207,800 309,700 16,400
153 Hip replacement, total and partial 383,500 * 300 17,900 108,900 199,700 56,100
157 Amputation of lower extremity (leg, foot, or toe) 124,500 100 1,000 11,000 46,700 54,000 11,700
158 Spinal fusion (correction of an unstable part of the spine by joining two or more vertebrae) 349,200 21 13,900 95,900 162,300 74,900 2,300
145 Treatment of fracture or dislocation of radius and ulna (lower arm) 80,800 * 13,400 22,000 18,900 19,500 6,600
Percent of all musculoskeletal all-listed procedures by age group
Total all musculoskeletal procedures 100.0 100.0 100.0 100.0 100.0 100.0 100.0
142 Partial excision of bone 6.1 6.0 7.6 8.3 7.6 4.4 1.8
146 Treatment of fracture or dislocation of hip and femur 9.2 11.3 12.7 4.9 3.9 10.4 34.6
147 Treatment of fracture or dislocation of lower extremity (leg, other than hip or femur) 6.5 1.1 9.4 13.4 6.8 3.3 2.4
152 Arthroplasty knee (surgical reconstruction or replacement of knee) 16.3 * 1.4 3.1 18.7 25.3 6.5
153 Hip replacement, total and partial 11.3 * 0.1 3.0 9.8 16.3 22.3
157 Amputation of lower extremity (leg, foot, or toe) 3.7 1.2 0.5 1.8 4.2 4.4 4.7
158 Spinal fusion (correction of an unstable part of the spine by joining two or more vertebrae) 10.3 0.3 7.0 16.1 14.6 6.1 0.9
145 Treatment of fracture or dislocation of radius and ulna (lower arm) 2.4 * 6.7 3.7 1.7 1.6 2.6
Standard errors
Total all musculoskeletal procedures 99,097 1,121 23,958 26,050 38,548 40,028 7,204
142 Partial excision of bone 9,492 97 2,450 2,756 4,213 2,591 255
146 Treatment of fracture or dislocation of hip and femur 7,643 150 3,254 2,036 1,354 3,457 2,503
147 Treatment of fracture or dislocation of lower extremity (leg, other than hip or femur) 7,489 22 1,426 3,943 2,671 1,175 247
152 Arthroplasty knee (surgical reconstruction or replacement of knee) 22,263 * 386 809 8,524 13,210 757
153 Hip replacement, total and partial 14,233 * 67 983 5,055 7,425 1,743
157 Amputation of lower extremity (leg, foot, or toe) 3,510 24 156 581 1,563 1,646 419
158 Spinal fusion (correction of an unstable part of the spine by joining two or more vertebrae) 18,995 10 2,303 5,756 9,411 4,358 168
145 Treatment of fracture or dislocation of radius and ulna (lower arm) 2,851 * 946 1,365 860 649 256
Source: AHRQ, Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project, Nationwide Inpatient Sample, 2005.
†Includes a small number of discharges (about 7,000 or 0.2 percent) with missing age.
*Statistic has a relative standard error (standard error/weighted estimate) greater than 0.30 and is not considered reliable.

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