Table 1

Baseline socio-demographic and pre-injury characteristics of participants (n=2856) in the POIS

Characteristicn (%)*
Gender
 Male1753 (61)
 Female1103 (39)
Age in years
 18–24396 (14)
 25–34593 (21)
 35–44630 (22)
 45–54703 (25)
 55–64534 (19)
Ethnicity
 New Zealand European1938 (68)
 Māori566 (20)
 Samoan100 (4)
 Cook Island Maori39 (1)
 Tongan45 (2)
 Niuean16 (<1)
 Chinese83 (3)
 Indian128 (4)
 Other474 (17)
Region of residence in New Zealand
 Auckland956 (33)
 Manukau783 (27)
 Gisborne201 (7)
 Otago598 (21)
 Southland318 (11)
Health status before injury
 Excellent834 (29)
 Very good1132 (40)
 Good723 (25)
 Fair124 (4)
 Poor36 (1)
Chronic illness before injury
 None1530 (54)
 Neck/back disorder429 (16)
 Asthma337 (12)
 Migraine279 (10)
 Arthritis238 (9)
 Depression238 (9)
 Anxiety161 (6)
 Heart disease133 (5)
 Diabetes130 (5)
 Irritable bowel112 (4)
 Osteoporosis64 (2)
 Stomach ulcers63 (2)
 Other comorbidities212 (8)
Paid employment before injury
 Full time (≥30 h per week)2332 (82)
 Part time (<30 h per week)294 (10)
 Not in paid employment229 (8)
Educational qualification
 None428 (15)
 Secondary school683 (24)
 Post-secondary school1676 (59)
Personal income in New Zealand dollars year before injury
 ≤$15 000236 (10)
 $15 001–$30 000412 (18)
 $30 001–$50 000882 (37)
 $50 001–$70 000467 (20)
 ≥$70 001361 (15)
  • * Percentages do not always equal 100 due to rounding.

  • Participants were able to respond to more than one category; five participants did not provide an answer to the question about ethnicity; all participants answered the question about chronic illness before injury.

  • Includes cancer, bronchitis/emphysema, epilepsy, myalgic encephalomyelitis (chronic fatigue syndrome), stroke, bipolar disorder (manic depression), chronic obstructive pulmonary disease, multiple sclerosis, motor neuron disease and schizophrenia.