Table 1. Test of association between responding to two-part income question and sociodemographic characteristics of patients
CharacteristicResponders, n = 10 441, n (%)a Non-responders, n = 3806, n (%)a P valueb
Sex P< 0.0001
 Male4435 (42)1252 (33)
 Female (reference)5738 (55)2133 (56)
 Otherc 98 (1)30 (1)
 Missing170 (2)391 (10)
Age, years P< 0.0001
 <1099 (1)98 (3)
 10–1978 (1)125 (3)
 20–291294 (12)625 (16)
 30–392704 (26)757 (20)
 40–492117 (20)618 (16)
 50–591944 (19)661 (17)
 60–691327 (13)494 (13)
 ≥70878 (8)428 (11)
 Median (IQR)44 (34–57)44 (31–59) P = 0.01
Language (spoken)
 English (reference)9764 (94)3382 (89) P< 0.0001
 Other624 (6)316 (8)
 Missing53 (1)108 (3)
Immigration status P< 0.0001
 Born outside Canada4193 (40)1689 (44)
 Canadian born (reference)6167 (59)1677 (44)
 Missing81 (1)440 (12)
Housing status P< 0.0001
 Own home (reference)4301 (41)1173 (31)
 Rent4846 (46)1300 (34)
 Other935 (9)359 (9)
 Missing359 (3)974 (26)
Ethnic group P< 0.0001
 White (reference)6128 (59)1414 (37)
 Non-White3901 (37)1636 (43)
 Missing412 (4)756 (20)
Sexual orientation P< 0.0001
 Heterosexual (reference)8173 (78)2611 (69)
 Gay, bisexual, lesbian, queer, two-spirit, or other1777 (17)345 (9)
 Missing491 (5)850 (22)
Mental health
 Severe mental illnessd 296 (3)107 (3) P = 0.99
Neighbourhood income quintilee
 Q1 (reference)2469 (28)1041 (32) P< 0.0001
 Q21458 (17)543 (17)
 Q31379 (16)493 (15)
 Q41399 (16)417 (13)
 Q52114 (24)717 (22)
  • aUnless otherwise stated. bχ2 for categorical and Mann-Whitney U Test for continuous variables (age) as age data not normally distributed; bold indicates statistically significant. cIncludes trans-FTM (female to male), trans-MTF (male to female), intersex, ‘other‘, and those who selected multiple sex terms. dIncludes patients with a bill submitted that includes the diagnostic code for schizophrenia, bipolar disorder, psychosis, paranoia, or psychosis not otherwise specified. eFor participants with a valid postal code (n = 8819 responders, n = 3211 non-responders), linkable to 2006 Census data on income. IQR = interquartile range. Q = quintile.