Table 5 Risk factors for completeness (Risk Ratio) of the three questions and regression analysis (Odds Ratio)

Mother

3856/4000

(96.4)

926/965

(96)

1 (0.99–1.02)

3698/3926

(94.2)

845/920

(91.9)

1.02 (1–1.05)*

3060/3571

(85.7)

652/808

(80.7)

1.06 (1.03–1.1)*

Age < 45 years

4045/4196

(96.4)

250/268

(93.4)

1.03 (1–1.07)*

3813/4087

(93.9)

241/263

(91.6)

1.03(0.99–1.06)

3241/3755

(86.3)

180/227

(79.1)

1.09 (1.03–1.16)*

1.27 (1.1–1.49)*

Having insurance

4778/4987

(95.8)

14/15

(93.8)

1.02 (0.9–1.16)

4571/4878

(93.7)

14/15

(93.8)

1 (0.89–1.13)

3700/4389

(84.3)

12/14

(87.5)

0.96 (0.8–1.16)

Special insurances

2077/2146

(96.8)

2173/2310

(94.8)

1.02 (1.01–1.03)*

1993/2102

(94.8)

2108/2267

(93)

1.02 (1–1.03)*

1664/1921

(86.6)

1658/2010

(82.5)

1.05 (1.03–1.08)*

Father's high educational status

3481/3611

(96.4)

1023/1077

(95)

1.02 (1–1.03)*

3325/3530

(94.2)

970/1049

(92.5)

1.02 (1–1.04)*

2821/3250

(86.8)

711/898

(79.2)

1.1 (1.06–1.13)*

0.87 (0.78–0.98)*

mother's high educational status

3978/4122

(96.5)

800/859

(93.1)

1.04 (1.02–1.06)*

4790/4023

(94.2)

770/843

(91.3)

1.03 (1–1.05)*

3218/3707

(86.8)

503/681

(73.8)

1.18 (1.13–1.22)*

0.85 (0.75–0.96)*

High or moderate income

4106/4273

(96.1)

541/573

(94.4)

1.02 (1–1.04)*

3945/4188

(94.2)

506/555

(91.1)

1.03 (1–1.06)*

3258/3806

(85.6)

390/487

(80)

1.07 (1.03–1.12)*

Immigrants

402/454

(88.5)

4304/4451

(96.7)

1.09 (1.06–1.13)*

0.43 (0.24–0.77)*

404/455

(88.7)

4078/4334

(94.1)

1.06 (1.03–1.1)*

0.6 (0.41–0.89)*

295/389

(75,8)

3343/3924

(85.2)

1.12 (1.07–1.18)*

2 (1.34–2.9)*

Habitants of regional towns

2945/3074

(95.8)

1816/1900

(95.6)

1 (1–1.01)*

2789/2992

(93.2)

1758/1869

(94)

0.99 (0.96–1.02)

1993/2336

(85.3)

1346/1636

(82.3)

1.04 (1.01–1.18)*

Having <3 children

4569/4764

(95.9)

257/273

(94.1)

1.02 (0.99–1.05)

4353/4651

(93.6)

259/274

(94.5)

0.99(0.96–1.02)

3573/4213

(84.8)

170/222

(76.6)

1.1 (1.04–1.18)*

single parents

270/285

(94.7)

4558/4753

(95.9)

0.99 (0.97–1)

263/281

(93.4)

4345/4642

(93.6)

1 (0.97–1.03)

213/253

(84.1)

3517/4177

(84.2)

1(0.95–1.05)

Child with non recurrent URIs

4002/4182

(95.7)

747/769

(97.1)

0.99 (0.97–1)

3804/4077

(93.3)

722/756

(95.5)

0.98 (0.96–0.99)

3117/3689

(84.5)

572/673

(85)

0.99 (0.96–1.03)

relative paediatrician

88/93

(94.9)

3729/3884

(96)

0.99 (0.94–1.03)

85/91

(93.7)

3522/3791

(92.9)

1.01 (0.96–1.07)

77/87

(88.8)

2860/3401

(84.1)

1.06 (0.98–1.13)

Poor access to healthcare system

2746/2840

(96.7)

1993/2098

(95)

1.02 (1–1.03)*

2600/2763

(94.1)

1934/2067

(93.6)

1.01 (0.99–1.02)

2136/2505

(85.3)

1547/1848

(83.7)

1.02 (1–1.04)*