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Table 1
Cohort characteristics, opioid-naïve children (aged 1 to 24 years) of opioid-naïve mothers who underwent surgery in Ontario, Canada, July 2013 to March 2017

Table 1
Cohort characteristics, opioid-naïve children (aged 1 to 24 years) of opioid-naïve mothers who underwent surgery in Ontario, Canada, July 2013 to March 2017
Table summary
This table displays the results of Cohort characteristics. The information is grouped by Characteristic (appearing as row headers), Total/overall
(n=283,550), Mother filled postoperative opioid prescription
(n=171,139), Mother did not fill postoperative opioid prescription
(n=112,411) and P-value, calculated using mean , standard deviation, p-value, number, percent and percent units of measure (appearing as column headers).
Characteristic	Total/overall (n=283,550)		Mother filled postoperative opioid prescription (n=171,139)		Mother did not fill postoperative opioid prescription (n=112,411)		P-value^{Table 1 Note ‡}
Characteristic	mean	standard deviation	mean	standard deviation	mean	standard deviation	p-value^{Table 1 Note ‡}
Age, child, years	10.6	6.6	11.0	6.8	10.0	6.8	<0.001
Age, mother, years	40.2	8.3	40.7	8.2	39.4	8.4	<0.001
	number	percent	number	percent	number	percent	p-value^{Table 1 Note ‡}
Sex, male	146,951	51.8	88,505	51.7	58,446	52.0	0.15
Residence
Rural	38,571	13.6	22,480	13.1	16,091	14.3	<0.001
Non-rural	244,979	86.4	148,659	86.9	96,320	85.7	N/A
Neighbourhood income quintile
First (lowest)	49,852	17.6	28,307	16.5	21,545	19.2	<0.001
Second	51,700	18.2	30,502	17.8	21,198	18.9	N/A
Third	57,094	20.1	34,490	20.2	22,604	20.1	N/A
Fourth	64,581	22.8	39,998	23.4	24,583	21.9	N/A
Fifth (highest)	57,930	20.4	36,559	21.4	21,371	19.0	N/A
Missing	2,393	0.8	1,283	0.7	1,110	1.0	N/A
Note ‡ chi-square (categorical) or t-tests (means) Return to note ‡ referrer Note: N/A stands for not applicable (single p-value is reported from chi-square test of cross-tabulated categorical variables). Sources: 1. Inpatient admissions (Discharge Abstract Database), 2. Same-day surgical procedures (Same Day Surgery Database), 3. Opioid prescriptions (Narcotics Monitoring System), 4. Emergency department presentations (National Ambulatory Care Reporting System), 5. Deaths (Office of the Registrar General – Deaths) and individual-level demographic information (Registered Persons Database), 6. Mother–baby linked database (ICES-derived MOMBABY database).

Date modified:: 2020-07-15