Variable

Definition

Summary of 51054 patients

Female

Dummy variable; 1: female, 0: otherwise

1: 28,745

Age

Age of patient

mean: 73.4, S.D.: 10.2

Over 70

Dummy variable; 1: Age 70 or over, 0: otherwise

1: 36,293

Comorbidity

Number of comorbidities,

0: 2814, 1: 11,938, 2: 5220,

3: 2724, 4: 3068

Complication

Number of complications

0: 33,993, 1: 10,992, 2: 5087

3: 772; 4: 210

Emergency

Dummy variable; 1: Emergency hospitalization, 0: otherwise

1: 9021

Outpatient

Dummy variable; 1: Outpatient, 0: otherwise

1: 48,267

Home

Dummy variable; 1: return to home, 0: otherwise

1: 46,003

Summer

Dummy variable; 1: summer⁺, 0: otherwise

1: 12,532

Winter

Dummy variable; 1: winter⁺⁺, 0: otherwise

1: 10,147

After 2006

Dummy variable; 1: After April 2006. 0: otherwise

1: 50,006

After 2008

Dummy variable; 1: After April 2008, 0: otherwise

1: 41,656

After 2010

Dummy variable; 1: After April 2010, 0: otherwise

1: 23,005

Trend

No. of months from April 2005

months from April 2005

Over Period

Dummy variable; 1: LOS exceeds the Specification

1: 1098

Hospitalization Period, 0: otherwise

ICD 10 dummies

H250⁺⁺⁺

senile incipient cataract

24,022 patients

H251

1: senile nuclear cataract, 0 otherwise

1: 7672

H252

1: senile cataract, morgagnian-type, 0 other wise

1: 535

H258

1: other senile cataract, 0: otherwise

1: 2395

H259

1: senile cataract, unspecified, 0: other wise

1: 5398

H260

1: infantile and juvenile cataract, 0: otherwise

1: 2828

H262

1: complicated cataract, 0: otherwise

1: 161

H263

1: drug-induced cataract, 0: otherwise

1: 119

H264

1: After-cataract, 0: otherwise

1: 50

H268

1: other specified cataract, 0: otherwise

1: 520

H269

1: unspecified cataract, 0 otherwise

1: 5938

H27

1: Other disorders of lens (H271 & H272), 0: otherwise

1: 171

H28

1: diabetic cataract (H281 & H282), 0: otherwise

1: 733

Hospital Dummies

Hp i

1: Hospital i; 0: otherwise