Table 2 Baseline data of study population

Age groups

• 1–3 years

32/435

7.4%

• 4–7 years

183/435

42.1%

• 8–12 years

175/435

40.2%

• 13–16 years

45/435

10.3%

Living with

• Mother

424/435

97.5%

• Father

339/435

77.9%

• Siblings

339/435

77.9%

• Other persons

50/435

11.5%

• More than one person

396/433

91.5%

School pupils

• 1st to 3rd form

148/275

53.8%

• 4th to 6th form

86/275

31.3%

• 7th to 11th form

41/275

4.9%

Health insurance coverage

• Statutory

389/434

89.6%

• Private

45/434

10.4%

Main diagnosis, International Classification of Diseases, Tenth Edition

• F00–F99 Mental and behavioural disorders

201/435

46.2%

• R00–R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

80/435

18.4%

• J00–J99 Diseases of the respiratory system

61/435

14.0%

• G00–G99 Diseases of the nervous system

25/435

5.7%

• M00–M99 Diseases of the musculoskeletal system and connective tissue

17/435

3.9%

• Other

51/435

11.7%

Disease duration

• 1–2 months

15/435

3.4%

• 3–5 months

15/435

3.4%

• 6–11 months

40/435

9.2%

• 1–4 years

241/435

55.4%

• ≥ 5 years

124/435

28.5%