Table 6 Risk factors related to completeness (Risk Ratio) of each questionnaire section and regression analysis (Odds Ratio)

Mother

3632

(87.6)

839

(83.8)

1.05 (1.02–1.08)*

3067

(73.6)

676

(67.5)

1.09 (1.04–1.14)*

3876

(93)

931

(93.1)

1 (0.98–1.02)

Age < 45 years

3830

(88)

243

(84.7)

1.04 (0.99–1.09)

3232

(74.3)

183

(63.8)

1.17 (1.07–1.27)*

1.14 (1.01–1.28)*

4072

(93.6)

266

(92.7)

1.01 (0.98–1.04)

Having insurance

4516

(86.8)

12

(75)

1.16 (0.87–1.54)

3748

(72)

10

(62.5)

1.15 (0.79–1.68)

4824

(92.7)

13

(81.3)

1.14 (0.9–1.44)

Special insurances

1949

(87.9)

2081

(85.4)

1.03 (1.01–1.05)*

1658

(74.8)

1704

(69.9)

1.07 (1.03–1.1) *

1.06 (1.01–1.11)*

2099

(94.7)

2218

(91)

1.04 (1.02–1.06)*

Father's high educational status

3282

(87.6)

968

(85.4)

1.03 (1–1.05)*

2826

(75.4)

736

(64.9)

1.16 (1.11–1.22)*

0.9 (0.82–0.98)*

3513

(93.8)

1022

(90.1)

1.04 (1.02–1.06)*

mother's high educational status

3750

(87.8)

761

(82.4)

1.07 (1.03–1.1) *

3204

(75)

539

(58.4)

1.28 (1.21–1.36)*

0.83 (0.76–0.91)*

4007

(93.8)

814

(88.2)

1.06 (1.04–1.09)*

High or moderate income

3892

(87.6)

510

(83.7)

1.05 (1.01–1.08)*

3281

(73.8)

386

(63.4)

1.16 (1.09–1.24)*

4153

(93.4)

548

(90)

1.04 (1.01–1.07)*

Immigrants

380

(74.1)

4064

(83.3)

1.19 (1.13–1.26)*

2.3 (1.71–3.14)*

296

(57.7)

3384

(73.5)

1.27 (1.18–1.37)*

1.65 (1.22–2.2)*

420

(81.9)

4321

(93.8)

1.15 (1.1–1.19)*

3.04 (2.2–4.3)*

Habitants of regional towns

2788

(86.9)

1709

(86)

1.01 (0.99–1.03)

2335

(72.8)

1394

(70.1)

1.04 (1–1.08)*

2978

(92.8)

1826

(91.9)

1.01 (0.99–1.03)

Having <3 children

4304

(86.6)

253

(87.2)

0.99 (0.95–1.04)

3590

(72.2)

190

(65.5)

1.1 (1.01–1.2) *

4600

(92.6)

271

(93.4)

0.99 (0.96–1.02)

single parents

246

(81.7)

4315

(87)

0.94 (0.89–0.99)*

203

(67.4)

3574

(72.1)

0.93 (0.86–1.01)

272

(90.4)

4596

(92.7)

0.97 (0.94–1.01)

Child with non recurrent URIs

3777

(86.5)

704

(88.9)

0.97 (0.95–1)

3141

(71.9)

586

(74)

0.97 (0.93–1.01)

4052

(92.8)

734

(92.7)

1 (0.98–1.02)

relative paediatrician

83

(84.7)

3522

(87.1)

0.97 (0.89–1.06)

73

(74.5)

2907

(71.9)

1.04 (0.92–1.17)

93

(94.9)

3741

(92.5)

1.03 (0.98–1.07)

Poor access to healthcare system

2610

(88.9)

1869

(84.6)

1.05 (1.03–1.07)*

0.84 (0.75–0.94)*

2143

(73)

1574

(71.3)

1.02 (0.99–1.06)

2751

(93.7)

2027

(91.8)

1.02 (1–1.04)*