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. 2009 Jun 11;59(564):510–516. doi: 10.3399/bjgp09X453431

Table 2.

Number and rates of sickness certificates issued by reason for consultation.

Read code chapter heading Total number of certificates issued Sickness certification rate per 1000 person years (95% CI), totala
Infectious/parasitic diseases 365 2.46 (2.21 to 2.72)

Neoplasms 219 1.48 (1.28 to 1.67)

Endocrine/metabolic 159 1.07 (0.91 to 1.24)

Blood diseases 24 0.16 (0.10 to 0.23)

Mental disorders 4116 27.78 (26.94 to 28.68)

Nervous system 653 4.41 (4.07 to 4.47)

Circulatory system 591 3.99 (3.67 to 4.31)

Respiratory system 1053 7.11 (6.68 to 7.53)

Digestive system 676 4.56 (4.22 to 4.91)

Genitourinary system 474 3.20 (2.91 to 3.49)

Pregnancy/childbirth/puerperium 324 2.19 (1.95 to 2.42)

Skin/subcutaneous tissue 397 2.68 (2.42 to 2.94)

Musculoskeletal 3384 22.84 (22.08 to 23.60)

Congenital anomalies 13 0.09 (0.04 to 0.14)

Ill-defined conditions/working diagnoses 983 6.63 (6.22 to 7.05)

Injury/poisoning 1154 7.79 (7.34 to 8.24)

Causes of injury/poisoning 122 0.82 (0.68 to 0.97)

Post-operativeb 325 2.19 (1.96 to 2.43)

Unknown reasonc 595 4.02 (3.69 to 4.34)
a

Rates are not presented by sex, as the numbers are small.

b

Not a Read code label, but included as many certificates were labelled as post-operative without a condition attached.

c

Not a Read code label.