Table 3 Factors associated with IADL from regression model

 65–69 years old (ref.)

–

–

–

–

 70–74 years old

−0.0312

− 0.0441, − 0.0183

−0.0235

− 0.0330, − 0.0141

 75–79 years old

−0.0740

− 0.0908, − 0.0571

−0.0434

− 0.0565, − 0.0302

 80–84 years old

− 0.1562

− 0.1821, − 0.1303

−0.1040

− 0.1233, − 0.0848

 85 years old and above

− 0.3014

− 0.3572, − 0.2457

−0.2166

− 0.2591, − 0.1740

 Obesity

0.0135

− 0.0079, 0.0350

−0.0026

− 0.0192, 0.0139

 Overweight

0.0275

0.0162 0.0388

0.0022

− 0.0059, 0.0104

 Emaciation

−0.1123

− 0.1460, − 0.0787

− 0.0437

− 0.0678, − 0.0195

 Normal (ref.)

–

–

–

–

 Male (ref.)

–

–

–

–

 Female

−0.0233

− 0.0345, − 0.0122

−0.0021

− 0.0130, 0.0087

 Han (ref.)

–

–

–

–

 Others

−0.0504

−0.0832, − 0.0175

−0.0093

− 0.0316, 0.0130

 University

0.1113

0.0847, 0.1380

0.0588

0.0364, 0.0811

 Middle school

0.0993

0.0764, 0.1221

0.0395

0.0213, 0.0576

 Primary school

0.0668

0.0424, 0.0913

0.0317

0.0130, 0.0503

 Illiterate (ref.)

–

–

–

–

 Divorced or widowed

−0.0583

−0.0816, −0.0350

−0.0013

− 0.0185, 0.0159

 Married (ref.)

–

–

–

–

 Yes

−0.3713

−0.4060, − 0.3365

−0.2835

− 0.3159, − 0.2510

 No (ref.)

–

–

–

–

 Yes

−0.2575

−0.2867, − 0.2284

−0.1491

− 0.1715, − 0.1268

 No (ref.)

–

–

–

–

 Emergency department

−0.0591

−0.0859, − 0.0323

−0.0142

− 0.0348, 0.0064

 Outpatient department (ref.)

–

–

–

–

 Transit from other hospitals

−0.0085

−0.0452, 0.0283

0.0240

−0.0015, 0.0495

 Others

−0.0150

− 0.0888, 0.0588

−0.0026

− 0.0500, 0.0447

 Building with elevators (ref.)

–

–

–

–

 Building without elevators

0.0092

−0.0036, 0.0220

0.0099

0.0004, 0.0194

 Bungalow

−0.0487

−0.0680, − 0.0295

−0.0137

− 0.0298, 0.0025

 Non-smoker (ref.)

–

–

–

–

 Current smoker

0.0245

0.0080, 0.0410

−0.0054

−0.0192, 0.0085

 Former smoker

−0.0120

−0.0276, 0.0035

− 0.0142

−0.0262, − 0.0022

 Non-drinker (ref.)

–

–

–

–

 Current drinker

0.0563

0.0429, 0.0697

0.0176

0.0062, 0.0290

 Former drinker

−0.0103

−0.0305, 0.0098

− 0.0092

−0.0242, 0.0059

 Yes

−0.0984

−0.1180, − 0.0789

−0.0484

− 0.0641, − 0.0327

 No (ref.)

–

–

–

–

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.0661

−0.0841, − 0.0481

−0.0132

− 0.0290, 0.0026

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.0767

−0.0945, − 0.0589

−0.0252

− 0.0413, − 0.0091

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.1517

−0.1733, − 0.1302

−0.0742

− 0.0895, − 0.0588

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.0529

−0.0634, − 0.0425

−0.0011

− 0.0094, 0.0073

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.0998

−0.1278, − 0.0718

−0.0365

− 0.0533, − 0.0197

 Normal (ref.)

–

–

–

–

 Dysfunction

−0.1195

−0.1442, − 0.0948

−0.0394

− 0.0559, − 0.0228